Wikidata:WikiProject British Politicians/Constituency checklist
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This list is periodically updated by a bot. Manual changes to the list will be removed on the next update!
WDQS | PetScan | TABernacle | Find images | Recent changes | Query:SELECT ?item WHERE { ?item wdt:P31 wd:Q27971968 . }| Name | description | Start | End | Region | Parent WP article |
|---|---|---|---|---|---|
| Aberafan Maesteg | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Wales | ||
| Aberavon | Parliamentary constituency in the United Kingdom, 1918 onwards | 1918-12-14 | 2024-05-30 | Neath Port Talbot | |
| Aberconwy | Parliamentary constituency in the United Kingdom, 2010-2024 | 2010-05-06 | 2024-05-30 | Conwy County Borough | |
| Aberdare | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Wales | |
| Aberdeen | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | Aberdeen City | |
| Aberdeen Burghs | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Scotland | |
| Aberdeen Central | Parliamentary constituency in the United Kingdom, 1997-2005 | 1997-05-01 | 2005-04-11 | Scotland | |
| Aberdeen North | Parliamentary constituency in Aberdeen, Scotland, UK, 1885 onwards | 1885-11-24 | Aberdeen City | ||
| Aberdeen South | Parliamentary constituency in Aberdeen, Scotland, UK, 1885 onwards | 1885-11-24 | Aberdeen City | ||
| Aberdeen and Kincardine Central | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | Aberdeenshire | |
| Aberdeen and Kincardine East | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | Aberdeenshire | |
| Aberdeenshire | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | Aberdeenshire | |
| Aberdeenshire East | Parliamentary constituency in the United Kingdom, 1868-1918 | 1868-11-17 | 1918-11-25 | Aberdeenshire | |
| Aberdeenshire North and Moray East | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Scotland | ||
| Aberdeenshire West | Parliamentary constituency in the United Kingdom, 1868-1918 | 1868-11-17 | 1918-11-25 | Aberdeenshire | |
| Abertillery | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Wales | |
| Abingdon | Parliamentary constituency in the United Kingdom, 1801-1983 | 1801 | 1983-05-13 | Abingdon-on-Thames | |
| Accrington | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | ||
| Acton | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Greater London | |
| Airdrie and Shotts | Parliamentary constituency in North Lanarkshire, Scotland, UK, 1997 onwards | 1997-05-01 | North Lanarkshire | ||
| Aldborough | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Yorkshire | |
| Aldeburgh | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Aldershot | Parliamentary constituency in the United Kingdom, 1918 onwards | 1918-12-14 | South East England | ||
| Aldridge-Brownhills | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | West Midlands | ||
| Alloa and Grangemouth | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Scotland | ||
| Altrincham | Parliamentary constituency in the United Kingdom, 1885-1945 | 1885-11-24 | 1945-06-15 | ||
| Altrincham and Sale | Parliamentary constituency in the United Kingdom, 1945-1997 | 1945-07-05 | 1997-04-08 | ||
| Altrincham and Sale West | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | North West England | ||
| Alyn and Deeside | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | Flintshire | ||
| Amber Valley | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | East Midlands | ||
| Amersham | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Andover | Parliamentary constituency in the United Kingdom, 1868-1918 | 1868-11-17 | 1918-11-25 | Hampshire | |
| Andover | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Angus | Parliamentary constituency in Angus, Scotland, UK, 1997 onwards | 1997-05-01 | 2024-05-30 | Angus | |
| Angus and Perthshire Glens | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Scotland | ||
| Anstruther Burghs | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Scotland | |
| Antrim | Parliamentary constituency in the United Kingdom, 1922-1950 | 1922-11-15 | 1950-02-03 | Northern Ireland | |
| Antrim | Parliamentary constituency in the United Kingdom, 1802-1885 | 1801-01-01 | 1885-11-18 | Ireland | |
| Antrim East | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| Antrim North | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| Antrim South | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| Appleby | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Westmorland | |
| Appleby | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801-01-01 | 1832-12-03 | Westmorland | |
| Arbroath and Broughty Ferry | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Scotland | ||
| Arfon | Parliamentary constituency in Wales, 2010-2024 | 2010-05-06 | 2024-05-30 | Gwynedd | |
| Arfon | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Wales | |
| Argyll and Bute | Parliamentary constituency in Argyll and Bute, Scotland, UK, 1983 onwards | 1983-06-09 | 2024-05-30 | Argyll and Bute | |
| Argyll, Bute and South Lochaber | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Scotland | ||
| Argyllshire | Parliamentary constituency in the United Kingdom, 1801-1983 | 1801 | 1983-05-13 | Scotland | |
| Armagh | Parliamentary constituency in the United Kingdom, 1922-1983 | 1922-11-15 | 1983-05-13 | Northern Ireland | |
| Armagh City | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Arundel | Parliamentary constituency in the United Kingdom, 1974-1997 | 1974-02-28 | 1997-04-08 | Sussex | |
| Arundel | Parliamentary constituency in the United Kingdom, 1832-1868 | 1832-12-08 | 1868-11-11 | ||
| Arundel | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Arundel and Shoreham | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | Sussex | |
| Arundel and South Downs | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | South East England | ||
| Ashburton | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Ashburton | Parliamentary constituency in the United Kingdom, 1832-1868 | 1832-12-10 | 1868-11-11 | ||
| Ashburton | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Ashfield | Parliamentary constituency in the United Kingdom, 1955 onwards | 1955-05-26 | East Midlands | ||
| Ashford | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | South East England | ||
| Ashton-under-Lyne | Parliamentary constituency in the United Kingdom, 1832 onwards | 1832-12-08 | North West England | ||
| Aston Manor | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Athlone | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Aylesbury | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | South East England | ||
| Aylesbury | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Ayr | Parliamentary constituency in the United Kingdom, 1950-2005 | 1950-02-23 | 2005-04-11 | Scotland | |
| Ayr Burghs | Parliamentary constituency in the United Kingdom, 1801-1950 | 1801 | 1950-02-03 | Ayrshire | |
| Ayr, Carrick and Cumnock | Parliamentary constituency in the United Kingdom, 2005 onwards | 2005-05-05 | South Ayrshire East Ayrshire |
||
| Ayrshire | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | Ayrshire | |
| Balham and Tooting | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Banbury | Parliamentary constituency in the United Kingdom, 1801 onwards | 1801 | South East England | ||
| Bandon | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Banff and Buchan | Parliamentary constituency in Aberdeenshire, Scotland, UK, 1983 onwards | 1983-06-09 | 2024-05-30 | Aberdeenshire | |
| Banffshire | Parliamentary constituency in the United Kingdom, 1801–1983 | 1801 | 1983-05-13 | Scotland | |
| Bangor Aberconwy | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Wales | ||
| Barking | Parliamentary constituency in the United Kingdom, 1945 onwards | 1945-07-05 | London Borough of Barking and Dagenham | ||
| Barkston Ash | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | ||
| Barnard Castle | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Barnet | Parliamentary constituency in the United Kingdom, 1945-1974 | 1945-07-05 | 1974-02-08 | ||
| Barnsley | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | ||
| Barnsley Central | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | Yorkshire and the Humber | |
| Barnsley East | Parliamentary constituency in the United Kingdom, 2010-2024 | 2010-05-06 | 2024-05-30 | Yorkshire and the Humber | |
| Barnsley East | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | South Yorkshire | |
| Barnsley East and Mexborough | Parliamentary constituency in the United Kingdom, 1997-2010 | 1997-05-01 | 2010-04-12 | South Yorkshire | |
| Barnsley North | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Yorkshire and the Humber | ||
| Barnsley South | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Yorkshire and the Humber | ||
| Barnsley West and Penistone | Parliamentary constituency in the United Kingdom, 1983-2010 | 1983-06-09 | 2010-04-12 | South Yorkshire | |
| Barnstaple | Parliamentary constituency in the United Kingdom, 1885–1950 | 1885-11-24 | 1950-02-03 | Devon | |
| Barnstaple | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Barons Court | Parliamentary constituency in the United Kingdom, 1955-1974 | 1955-05-26 | 1974-02-08 | ||
| Barrow and Furness | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | North West England | ||
| Barry | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | Wales | |
| Basildon | Parliamentary constituency in the United Kingdom, 1974-2010 | 1974-02-28 | 2010-04-12 | Essex | |
| Basildon and Billericay | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | East of England | ||
| Basingstoke | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | South East England | ||
| Bassetlaw | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | East Midlands | ||
| Bath | Parliamentary constituency in the United Kingdom, 1918 onwards | 1918-12-14 | South West England | ||
| Bath | Parliamentary constituency in the United Kingdom, 1801-1918 | 1801 | 1918-11-25 | ||
| Bathgate and Linlithgow | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Scotland | ||
| Batley and Morley | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | West Yorkshire | |
| Batley and Spen | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | Yorkshire and the Humber | |
| Battersea | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | London Borough of Wandsworth | ||
| Battersea | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Battersea North | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | ||
| Battersea South | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Battersea | |
| Beaconsfield | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | South East England | ||
| Beaumaris | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Isle of Anglesey Wales |
|
| Bebington | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | Bebington | |
| Bebington and Ellesmere Port | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | ||
| Beckenham | Parliamentary constituency in the United Kingdom, 1950-2024 | 1950-02-23 | 2024-05-30 | London Borough of Bromley | |
| Beckenham and Penge | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | London | ||
| Bedford | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | East of England | ||
| Bedford | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | ||
| Bedford | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Bedfordshire | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Bedwellty | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Wales | |
| Beeston | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | Beeston | |
| Belfast | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | Ireland | |
| Belfast | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Ireland | |
| Belfast Cromac | Parliamentary constituency in the United Kingdom, 1918-1922 | 1918-12-14 | 1922-10-26 | Ireland | |
| Belfast Duncairn | Parliamentary constituency in the United Kingdom, 1918-1922 | 1918-12-14 | 1922-10-26 | Ireland | |
| Belfast East | Parliamentary constituency in the United Kingdom, 1922 onwards | 1922-11-15 | Northern Ireland | ||
| Belfast East | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Ireland | |
| Belfast Falls | Parliamentary constituency in the United Kingdom, 1918-1922 | 1918-12-14 | 1922-10-26 | Ireland | |
| Belfast North | Parliamentary constituency in the United Kingdom, 1922 onwards | 1922-11-15 | Northern Ireland | ||
| Belfast North | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Ireland | |
| Belfast Ormeau | Parliamentary constituency in the United Kingdom, 1918-1922 | 1918-12-14 | 1922-10-26 | Ireland | |
| Belfast Pottinger | Parliamentary constituency in the United Kingdom, 1918-1922 | 1918-12-14 | 1922-10-26 | Ireland | |
| Belfast Shankill | Parliamentary constituency in the United Kingdom, 1918-1922 | 1918-12-14 | 1922-10-26 | Ireland | |
| Belfast South | Parliamentary constituency in the United Kingdom, 1922-2024 | 1922-11-15 | 2024-05-30 | Northern Ireland | |
| Belfast South | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Ireland | |
| Belfast South and Mid Down | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Northern Ireland | ||
| Belfast St Anne's | Parliamentary constituency in the United Kingdom, 1918-1922 | 1918-12-14 | 1922-10-26 | Ireland | |
| Belfast Victoria | Parliamentary constituency in the United Kingdom, 1918-1922 | 1918-12-14 | 1922-10-26 | Ireland | |
| Belfast West | Parliamentary constituency in the United Kingdom, 1922 onwards | 1922-11-15 | Northern Ireland | ||
| Belfast West | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Ireland | |
| Belfast Woodvale | Parliamentary constituency in the United Kingdom, 1918-1922 | 1918-12-14 | 1922-10-26 | Ireland | |
| Belper | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | ||
| Bere Alston | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Berkshire | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| Berkshire | Parliamentary constituency in the United Kingdom (1801-1832) | 1801 | 1832 | ||
| Bermondsey | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | Greater London | |
| Bermondsey | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Bermondsey West | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Bermondsey and Old Southwark | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | London Borough of Southwark | ||
| Berwick and East Lothian | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | East Lothian Scottish Borders |
|
| Berwick and Haddington | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | East Lothian Scottish Borders |
|
| Berwick-upon-Tweed | Parliamentary constituency in the United Kingdom, 1885-2024 | 1885-11-24 | 2024-05-30 | North East England | |
| Berwick-upon-Tweed | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Berwickshire | Parliamentary constituency in the United Kingdom, 1801-1918 | 1801 | 1918-11-25 | Scotland | |
| Berwickshire, Roxburgh and Selkirk | Parliamentary constituency in Scottish Borders, Scotland, UK, 2005 onwards | 2005-05-05 | Scottish Borders | ||
| Bethnal Green | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | London | |
| Bethnal Green North East | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Bethnal Green South West | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Bethnal Green and Bow | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | London Borough of Tower Hamlets | |
| Bethnal Green and Bow | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | London Borough of Tower Hamlets | |
| Bethnal Green and Stepney | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | ||
| Bethnal Green and Stepney | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | London | ||
| Beverley | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Beverley | |
| Beverley | Parliamentary constituency in the United Kingdom, 1950-1955 | 1950-02-23 | 1955-05-06 | ||
| Beverley | Parliamentary constituency in the United Kingdom, 1801-1870 | 1801 | 1870 | ||
| Beverley and Holderness | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | Yorkshire and the Humber | ||
| Bewdley | Parliamentary constituency in the United Kingdom, 1801-1950 | 1801 | 1950-02-03 | ||
| Bexhill and Battle | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | South East England | ||
| Bexley | Parliamentary constituency in the United Kingdom, 1945-1974 | 1945-07-05 | 1974-02-08 | ||
| Bexleyheath | Parliamentary constituency in the United Kingdom, 1974-1997 | 1974-02-28 | 1997-04-08 | ||
| Bexleyheath and Crayford | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | London Borough of Bexley | ||
| Bicester and Woodstock | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South East England | ||
| Biggleswade | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Billericay | Parliamentary constituency in the United Kingdom, 1983-2010 | 1983-06-09 | 2010-04-12 | Billericay | |
| Billericay | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | ||
| Bilston | Parliamentary constituency in the United Kingdom, 1918-1974 | 1918-12-14 | 1974-02-08 | ||
| Birkenhead | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | North West England | ||
| Birkenhead | Parliamentary constituency in the United Kingdom, 1861-1918 | 1861 | 1918-11-25 | ||
| Birkenhead East | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Birkenhead West | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Birmingham | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | ||
| Birmingham | Parliamentary constituency in the United Kingdom (1832-1868) | 1832-12-10 | 1868-11-11 | ||
| Birmingham Acock's Green | Parliamentary constituency in the United Kingdom, 1945-1950 | 1945-07-05 | 1950-02-03 | ||
| Birmingham All Saints | Parliamentary constituency in the United Kingdom, 1955-1974 | 1955-05-26 | 1974-02-08 | ||
| Birmingham Aston | Parliamentary constituency in the United Kingdom, 1918-1974 | 1918-12-14 | 1974-02-08 | ||
| Birmingham Bordesley | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Birmingham Central | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Birmingham Deritend | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Birmingham Duddeston | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Birmingham East | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Birmingham Edgbaston | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | West Midlands | ||
| Birmingham Erdington | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | West Midlands | ||
| Birmingham Erdington | Parliamentary constituency in the United Kingdom, 1918-1955 | 1918-12-14 | 1955-05-06 | ||
| Birmingham Hall Green | Parliamentary constituency in the United Kingdom, 1950-2024 | 1950-02-23 | 2024-05-30 | West Midlands | |
| Birmingham Hall Green and Moseley | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | West Midlands | ||
| Birmingham Handsworth | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | ||
| Birmingham Hodge Hill | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | West Midlands | |
| Birmingham Hodge Hill and Solihull North | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | West Midlands | ||
| Birmingham King's Norton | Parliamentary constituency in the United Kingdom, 1918-1955 | 1918-12-14 | 1955-05-06 | ||
| Birmingham Ladywood | Parliamentary constituency in the United Kingdom, 1918 onwards | 1918-12-14 | West Midlands | ||
| Birmingham Moseley | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Birmingham North | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Birmingham Northfield | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | West Midlands | ||
| Birmingham Perry Barr | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | West Midlands | ||
| Birmingham Selly Oak | Parliamentary constituency in the United Kingdom, 1955 onwards | 1955-05-26 | West Midlands | ||
| Birmingham Small Heath | Parliamentary constituency in the United Kingdom, 1950-1997 | 1950-02-23 | 1997-04-08 | Birmingham | |
| Birmingham South | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Birmingham Sparkbrook | Parliamentary constituency in the United Kingdom, 1918-1997 | 1918-12-14 | 1997-04-08 | Birmingham | |
| Birmingham Sparkbrook and Small Heath | Parliamentary constituency in the United Kingdom, 1997-2010 | 1997-05-01 | 2010-04-12 | Birmingham | |
| Birmingham Stechford | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | Birmingham | |
| Birmingham West | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Birmingham Yardley | Parliamentary constituency in the United Kingdom, 1918 onwards | 1918-12-14 | West Midlands | ||
| Birr | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Ireland | |
| Bishop Auckland | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | North East England | ||
| Bishop's Castle | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Blaby | Parliamentary constituency in the United Kingdom, 1974-2010 | 1974-02-28 | 2010-04-12 | Leicestershire | |
| Blackburn | Parliamentary constituency in the United Kingdom, 1955 onwards | 1955-05-26 | North West England | ||
| Blackburn | Parliamentary constituency in the United Kingdom, 1832-1950 | 1832-12-08 | 1950-02-03 | ||
| Blackburn East | Parliamentary constituency in the United Kingdom, 1950-1955 | 1950-02-23 | 1955-05-06 | Blackburn | |
| Blackburn West | Parliamentary constituency in the United Kingdom, 1950-1955 | 1950-02-23 | 1955-05-06 | Blackburn | |
| Blackley and Broughton | Parliamentary constituency in the United Kingdom, 2010-2024 | 2010-05-06 | 2024-05-30 | North West England | |
| Blackley and Middleton South | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | North West England | ||
| Blackpool | Parliamentary constituency in the United Kingdom, 1885-1945 | 1885-11-24 | 1945-06-15 | ||
| Blackpool North | Parliamentary constituency in the United Kingdom, 1945-1997 | 1945-07-05 | 1997-04-08 | Blackpool | |
| Blackpool North and Cleveleys | Parliamentary constituency in the United Kingdom, 2010-2024 | 2010-05-06 | 2024-05-30 | North West England | |
| Blackpool North and Fleetwood | Parliamentary constituency in the United Kingdom, 1997-2010 | 1997-05-01 | 2010-04-12 | Lancashire | |
| Blackpool North and Fleetwood | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Lancashire | ||
| Blackpool South | Parliamentary constituency in the United Kingdom, 1945 onwards | 1945-07-05 | North West England | ||
| Blaenau Gwent | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | Blaenau Gwent County Borough | |
| Blaenau Gwent and Rhymney | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Wales | ||
| Blaydon | Parliamentary constituency in the United Kingdom, 1918-2024 | 1918-12-14 | 2024-05-30 | North East England | |
| Blaydon and Consett | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | North East England | ||
| Bletchingley | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Blyth Valley | Parliamentary constituency in the United Kingdom, 1950-2024 | 1950-02-23 | 2024-05-30 | North East England | |
| Blyth and Ashington | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | North East England | ||
| Bodmin | Parliamentary constituency in the United Kingdom, 1868-1983 | 1868-11-17 | 1983-05-13 | Cornwall | |
| Bodmin | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Bognor Regis and Littlehampton | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | South East England | ||
| Bolsover | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | East Midlands | ||
| Bolton | Parliamentary constituency in the United Kingdom, 1832-1950 | 1832-12-08 | 1950-02-03 | ||
| Bolton East | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | Bolton | |
| Bolton North East | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | North West England | ||
| Bolton South East | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | North West England | |
| Bolton South and Walkden | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | North West England | ||
| Bolton West | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | North West England | ||
| Boothferry | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | ||
| Bootle | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | North West England | ||
| Boroughbridge | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Bossiney | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Cornwall | |
| Boston | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Lincolnshire | |
| Boston | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Boston and Skegness | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | East Midlands | ||
| Bosworth | Parliamentary constituency in the United Kingdom, 1885-2024 | 1885-11-24 | 2024-05-30 | East Midlands | |
| Bothwell | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Lanarkshire | |
| Bournemouth | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Bournemouth East | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | South West England | ||
| Bournemouth East and Christchurch | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | ||
| Bournemouth West | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | South West England | ||
| Bow and Bromley | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Bow and Poplar | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | ||
| Brackley | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Bracknell | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | South East England | ||
| Bradford | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| Bradford Central | Parliamentary constituency in the United Kingdom, 1885-1955 | 1885-11-24 | 1955-05-06 | ||
| Bradford East | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | Yorkshire and the Humber | ||
| Bradford East | Parliamentary constituency in the United Kingdom, 1885-1974 | 1885-11-24 | 1974-02-08 | ||
| Bradford North | Parliamentary constituency in the United Kingdom, 1918-2010 | 1918-12-14 | 2010-04-12 | Bradford | |
| Bradford South | Parliamentary constituency in the United Kingdom, 1918 onwards | 1918-12-14 | Yorkshire and the Humber | ||
| Bradford West | Parliamentary constituency in the United Kingdom, 1955 onwards | 1955-05-26 | Yorkshire and the Humber | ||
| Bradford West | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Braintree | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | East of England | ||
| Bramber | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Sussex | |
| Brecon | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Wales | |
| Brecon and Radnorshire | Parliamentary constituency in the United Kingdom, 1918-2024 | 1918-12-14 | 2024-05-30 | Powys | |
| Brecon, Radnor and Cwm Tawe | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Wales | ||
| Breconshire | Parliamentary constituency in the United Kingdom, 1801-1918 | 1801 | 1918-11-25 | Wales | |
| Brent Central | Parliamentary constituency in the United Kingdom, 2010-2024 | 2010-05-06 | 2024-05-30 | London Borough of Brent | |
| Brent East | Parliamentary constituency in the United Kingdom, 1974-2010 | 1974-02-28 | 2010-04-12 | London Borough of Brent | |
| Brent East | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | London Borough of Brent | ||
| Brent North | Parliamentary constituency in the United Kingdom, 1974-2024 | 1974-02-28 | 2024-05-30 | London Borough of Brent | |
| Brent South | Parliamentary constituency in the United Kingdom, 1974-2010 | 1974-02-28 | 2010-04-12 | London Borough of Brent | |
| Brent West | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | London | ||
| Brentford | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Brentford and Chiswick | Parliamentary constituency in the United Kingdom, 1918-1974 | 1918-12-14 | 1974-02-08 | ||
| Brentford and Isleworth | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | London Borough of Hounslow | ||
| Brentwood and Ongar | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | East of England | ||
| Bridgend | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | Bridgend County Borough | ||
| Bridgnorth | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | Shropshire | |
| Bridgnorth | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Bridgwater | Parliamentary constituency in the United Kingdom, 1885-2010 | 1885-11-24 | 2010-04-12 | Somerset | |
| Bridgwater | Parliamentary constituency in the United Kingdom, 1801-1870 | 1801 | 1870 | ||
| Bridgwater | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Somerset | ||
| Bridgwater and West Somerset | Parliamentary constituency in the United Kingdom, 2010-2024 | 2010-05-06 | 2024-05-30 | South West England | |
| Bridlington | Parliamentary constituency in the United Kingdom, 1950-1997 | 1950-02-23 | 1997-04-08 | ||
| Bridlington and The Wolds | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Yorkshire and the Humber | ||
| Bridport | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | Dorset | |
| Bridport | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Brierley Hill | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | ||
| Brigg | Parliamentary constituency in the United Kingdom, 1885-1974 | 1885-11-24 | 1974-02-08 | ||
| Brigg and Cleethorpes | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Lincolnshire | |
| Brigg and Goole | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | Yorkshire and the Humber | |
| Brigg and Immingham | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Yorkshire and the Humber | ||
| Brigg and Scunthorpe | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | Humberside | |
| Brighouse and Spenborough | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | ||
| Brighton | Parliamentary constituency in the United Kingdom, 1832-1950 | 1832-12-08 | 1950-02-03 | ||
| Brighton Kemptown | Parliamentary constituency in the United Kingdom, 1950-2024 | 1950-02-23 | 2024-05-30 | South East England | |
| Brighton Kemptown and Peacehaven | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South East England | ||
| Brighton Pavilion | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | South East England | ||
| Bristol | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | City of Bristol | |
| Bristol Central | Parliamentary constituency in the United Kingdom, 1918-1974 | 1918-12-14 | 1974-02-08 | ||
| Bristol Central | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South West England | ||
| Bristol East | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | South West England | ||
| Bristol East | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Bristol North | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Bristol North East | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | ||
| Bristol North East | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South West England | ||
| Bristol North West | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | South West England | ||
| Bristol South | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | South West England | ||
| Bristol South East | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | ||
| Bristol West | Parliamentary constituency in the United Kingdom, 1885-2024 | 1885-11-24 | 2024-05-30 | South West England | |
| Brixton | Parliamentary constituency in the United Kingdom, 1885-1974 | 1885-11-24 | 1974-02-08 | ||
| Broadland | Parliamentary constituency in the United Kingdom, 2010-2024 | 2010-05-06 | 2024-05-30 | East of England | |
| Broadland and Fakenham | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | East of England | ||
| Bromley | Parliamentary constituency in the United Kingdom, 1918-1974 | 1918-12-14 | 1974-02-08 | ||
| Bromley and Biggin Hill | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | London | ||
| Bromley and Chislehurst | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | London Borough of Bromley | |
| Bromsgrove | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | West Midlands | ||
| Bromsgrove | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | West Midlands | |
| Bromsgrove and Redditch | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | ||
| Broxbourne | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | East of England | ||
| Broxtowe | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | East Midlands | ||
| Broxtowe | Parliamentary constituency in the United Kingdom, 1918-1955 | 1918-12-14 | 1955-05-06 | ||
| Buckingham | Parliamentary constituency in the United Kingdom, 1868-2024 | 1868-11-17 | 2024-05-30 | South East England | |
| Buckingham | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Buckingham and Bletchley | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South East England | ||
| Buckinghamshire | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | Buckinghamshire | |
| Buckinghamshire | Parliamentary constituency in the United Kingdom (1801-1832) | 1801 | 1832 | ||
| Bucklow | Parliamentary constituency in the United Kingdom, 1945-1950 | 1945-07-05 | 1950-02-03 | ||
| Buckrose | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Burnley | Parliamentary constituency in the United Kingdom, 1868 onwards | 1868-11-17 | North West England | ||
| Burslem | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | City of Stoke-on-Trent | |
| Burton | Parliamentary constituency in the United Kingdom, 1885-2024 | 1885-11-24 | 2024-05-30 | West Midlands | |
| Burton and Uttoxeter | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | West Midlands | ||
| Bury | Parliamentary constituency in the United Kingdom, 1832-1950 | 1832-12-08 | 1950-02-03 | ||
| Bury North | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | North West England | ||
| Bury South | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | North West England | ||
| Bury St Edmunds | Parliamentary constituency in the United Kingdom, 1885-2024 | 1885-11-24 | 2024-05-30 | East of England | |
| Bury St Edmunds | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Bury St Edmunds and Stowmarket | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | East of England | ||
| Bury and Radcliffe | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | Lancashire | |
| Bute and Northern Ayrshire | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Scotland | |
| Buteshire | Parliamentary constituency in the United Kingdom, 1801-1918 | 1801-01-01 | 1918-11-25 | Scotland | |
| Caerfyrddin | Caerfyrddin | ||||
| Caerfyrddin | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Wales | ||
| Caernarfon | Parliamentary constituency in the United Kingdom, 1801-2010 | 1801 | 2010-04-12 | Gwynedd Wales |
|
| Caernarvonshire | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | Wales | |
| Caernarvonshire | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Caerphilly | Parliamentary constituency in the United Kingdom, 1918 onwards | 1918-12-14 | Caerphilly County Borough | ||
| Caithness | Parliamentary constituency in the United Kingdom, 1801-1918 | 1801 | 1918-11-25 | Scotland | |
| Caithness and Sutherland | Parliamentary constituency in the United Kingdom, 1918-1997 | 1918-12-14 | 1997-04-08 | Scotland | |
| Caithness, Sutherland and Easter Ross | Parliamentary constituency in Highland, Scotland, UK, 1997 onwards | 1997-05-01 | Highland | ||
| Calder Valley | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | Yorkshire and the Humber | ||
| Callington | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Calne | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| Calne | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Camberwell North | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Camberwell North West | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Camberwell and Peckham | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | London Borough of Southwark | |
| Camborne | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Camborne and Redruth | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | South West England | ||
| Cambridge | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | East of England | ||
| Cambridge | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Cambridge University | Parliamentary constituency in the United Kingdom, 1801-1950 | 1801 | 1950-02-03 | England | |
| Cambridgeshire | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | ||
| Cambridgeshire | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| Cambridgeshire | Parliamentary constituency in the United Kingdom (1801-1832) | 1801 | 1832 | ||
| Camelford | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Camelford | |
| Cannock | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Staffordshire | |
| Cannock Chase | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | West Midlands | ||
| Cannock and Burntwood | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Staffordshire | |
| Canterbury | Parliamentary constituency in the United Kingdom, 1295 onwards | 1885-11-24 | South East England | ||
| Canterbury | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Cardiff | Parliamentary constituency in the United Kingdom, 1801-1918 | 1801 | 1918-11-25 | Cardiff Wales |
|
| Cardiff Central | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | Cardiff | |
| Cardiff Central | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | Wales | |
| Cardiff East | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | Wales | |
| Cardiff East | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Wales | ||
| Cardiff North | parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | Cardiff | ||
| Cardiff North West | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | Wales | |
| Cardiff South | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | Wales | |
| Cardiff South East | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | Wales | |
| Cardiff South and Penarth | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | Cardiff Vale of Glamorgan |
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| Cardiff West | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | Cardiff | ||
| Cardigan Boroughs | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Wales | |
| Cardiganshire | Parliamentary constituency in the United Kingdom, 1801-1983 | 1801 | 1983 | Wales | |
| Carlisle | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | North West England | ||
| Carlisle | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Carlow Borough | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Carlow County | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| Carlow County | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Carlton | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | ||
| Carmarthen | Parliamentary constituency in the United Kingdom, 1801-1997 | 1801 | 1997-04-08 | Wales | |
| Carmarthen East and Dinefwr | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | Carmarthenshire | |
| Carmarthen West and South Pembrokeshire | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | Carmarthenshire Pembrokeshire |
|
| Carmarthenshire | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | Wales | |
| Carmarthenshire | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Wales | |
| Carrick, Cumnock and Doon Valley | Parliamentary constituency in the United Kingdom, 1983-2005 | 1983-06-09 | 2005-04-11 | Scotland | |
| Carrickfergus | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Carshalton | Parliamentary constituency in the United Kingdom, 1945-1983 | 1945-07-05 | 1983-05-13 | ||
| Carshalton and Wallington | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | London Borough of Sutton | ||
| Cashel | Parliamentary constituency in the United Kingdom, 1801-1870 | 1801 | 1870 | Ireland | |
| Castle Point | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | East of England | ||
| Castle Rising | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Cavan | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Central Ayrshire | Parliamentary constituency in the United Kingdom, 2005 onwards | 2005-05-05 | North Ayrshire South Ayrshire |
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| Central Ayrshire | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | Scotland | |
| Central Devon | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | South West England | ||
| Central Dunbartonshire | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | Scotland | |
| Central Fife | Parliamentary constituency in the United Kingdom, 1974-2005 | 1974-02-28 | 2005-04-11 | Scotland | |
| Central Norfolk | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | ||
| Central Suffolk | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Suffolk | |
| Central Suffolk and North Ipswich | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | East of England | ||
| Ceredigion | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997 | 2024-05-30 | Wales | |
| Ceredigion Preseli | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Wales | ||
| Ceredigion and Pembroke North | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983 | 1997 | Wales | |
| Charnwood | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | East Midlands | |
| Chatham | Parliamentary constituency in the United Kingdom, 1832-1950 | 1832-12-08 | 1950-02-03 | ||
| Chatham and Aylesford | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | South East England | ||
| Cheadle | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | North West England | ||
| Chelmsford | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | East of England | ||
| Chelmsford | Parliamentary constituency in the United Kingdom, 1885-1997 | 1885-11-24 | 1997-04-08 | Essex | |
| Chelsea | Parliamentary constituency in the United Kingdom, 1885-1997 | 1885-11-24 | 1997-04-08 | ||
| Chelsea | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | ||
| Chelsea and Fulham | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | London Borough of Hammersmith and Fulham Royal Borough of Kensington and Chelsea |
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| Cheltenham | Parliamentary constituency in the United Kingdom, 1832 onwards | 1832-12-08 | South West England | ||
| Chertsey | Parliamentary constituency in the United Kingdom, 1885-1974 | 1885-11-24 | 1974-02-08 | ||
| Chertsey and Walton | Parliamentary constituency in the United Kingdom, 1974-1997 | 1974-02-28 | 1997-04-08 | Surrey | |
| Chesham and Amersham | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | South East England | ||
| Cheshire | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832 | Cheshire | |
| Chester North and Neston | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | North West England | ||
| Chester South and Eddisbury | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | North West England | ||
| Chester-le-Street | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | Chester-le-Street | |
| Chesterfield | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | East Midlands | ||
| Chesterton | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Cambridgeshire | |
| Chichester | Parliamentary constituency in the United Kingdom, 1868 onwards | 1868-11-17 | South East England | ||
| Chichester | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Chigwell | Parliamentary constituency in the United Kingdom, 1955-1974 | 1955-05-26 | 1974-02-08 | ||
| Chingford | Parliamentary constituency in the United Kingdom, 1974-1997 | 1974-02-28 | 1997-04-08 | Greater London | |
| Chingford and Woodford Green | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | London Borough of Waltham Forest | ||
| Chippenham | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | South West England | ||
| Chippenham | Parliamentary constituency in the United Kingdom, 1868-1983 | 1868-11-17 | 1983-05-13 | Wiltshire | |
| Chippenham | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Chipping Barnet | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | London Borough of Barnet | ||
| Chislehurst | Parliamentary constituency in the United Kingdom, 1918-1997 | 1918-12-14 | 1997-04-08 | Chislehurst | |
| Chorley | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | North West England | ||
| Christchurch | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | South West England | ||
| Christchurch | Parliamentary constituency in the United Kingdom, 1832-1918 | 1832-12-08 | 1918-11-25 | ||
| Christchurch | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Christchurch and Lymington | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | ||
| Cirencester | Parliamentary constituency in the United Kingdom, 1868-1918 | 1868-11-17 | 1918-11-25 | ||
| Cirencester | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Cirencester and Tewkesbury | Parliamentary constituency in the United Kingdom, 1918-1997 | 1918-12-14 | 1997-04-08 | ||
| Cities of London and Westminster | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | City of Westminster City of London |
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| City of Chester | Parliamentary constituency in the United Kingdom, 1885-2024 | 1885-11-24 | 2024-05-30 | North West England | |
| City of Chester | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| City of Durham | parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | North East England | ||
| City of Durham | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| City of London | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | London | |
| City of London | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | City of London | |
| City of York | Parliamentary constituency in the United Kingdom, 1918-2010 | 1918-12-14 | 2010-04-12 | York | |
| City of York | Parliamentary constituency in the United Kingdom, 1801-1918 | 1801 | 1918-11-25 | York | |
| Clackmannan | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Scotland | |
| Clackmannan and Eastern Stirlingshire | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Scotland | |
| Clackmannanshire | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832 | Scotland | |
| Clackmannanshire and Kinross-shire | Parliamentary constituency in the United Kingdom, 1832-1918 | 1832-12-08 | 1918-11-25 | Scotland | |
| Clacton | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | East of England | ||
| Clapham | Parliamentary constituency in the United Kingdom, 1885-1974 | 1885-11-24 | 1974-02-08 | ||
| Clapham and Brixton Hill | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | London | ||
| Clare | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Clay Cross | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Cleethorpes | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | Yorkshire and the Humber | |
| Cleveland | Parliamentary constituency in the United Kingdom, 1885-1974 | 1885-11-24 | 1974-02-08 | ||
| Cleveland and Whitby | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | ||
| Clitheroe | Parliamentary constituency in the United Kingdom, 1832-1983 | 1832-12-08 | 1983-05-13 | Lancashire | |
| Clitheroe | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Clonmel | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Clwyd East | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Wales | ||
| Clwyd North | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Wales | ||
| Clwyd North West | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Wales | |
| Clwyd South | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | Denbighshire Wrexham County Borough |
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| Clwyd South West | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Wales | |
| Clwyd West | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | Conwy County Borough Denbighshire |
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| Clyde Burghs | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832 | Scotland | |
| Clydebank and Milngavie | Parliamentary constituency in the United Kingdom, 1983-2005 | 1983-06-09 | 2005-04-11 | Scotland | |
| Clydesdale | Parliamentary constituency in the United Kingdom, 1983-2005 | 1983-06-09 | 2005-04-11 | Scotland | |
| Coatbridge | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | Scotland | |
| Coatbridge and Airdrie | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | Scotland | |
| Coatbridge and Bellshill | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | North Lanarkshire | ||
| Coatbridge and Chryston | Parliamentary constituency in the United Kingdom, 1997-2005 | 1997-05-01 | 2005-04-11 | Scotland | |
| Coatbridge, Chryston and Bellshill | Parliamentary constituency in the United Kingdom, 2005-2024 | 2005-05-05 | 2024-05-30 | North Lanarkshire | |
| Cockermouth | Parliamentary constituency in the United Kingdom, 1868-1918 | 1868-11-17 | 1918-11-25 | ||
| Cockermouth | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Colchester | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | East of England | ||
| Colchester | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Colchester | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | ||
| Colchester North | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Essex | |
| Coleraine | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Colne Valley | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | Yorkshire and the Humber | ||
| Combined English Universities | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Combined Scottish Universities | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | Scotland | |
| Congleton | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | North West England | ||
| Consett | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | ||
| Conwy | Parliamentary constituency in the United Kingdom, 1950-2010 | 1950-02-23 | 2010-04-12 | Wales | |
| Copeland | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | North West England | |
| Corby | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | East Midlands | |
| Corby and East Northamptonshire | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | East Midlands | ||
| Corfe Castle | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Dorset | |
| Cork City | Parliamentary constituency in the United Kingdom, 1801-1922 | 1801 | 1922-10-26 | Ireland | |
| Cork County | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Cornwall | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| County Armagh | Parliamentary constituency in the United Kingdom, 1802-1885 | 1801-01-01 | 1885-11-18 | Ireland | |
| County Durham | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| County Kilkenny | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| County Limerick | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| County Louth | Parliamentary constituency in the United Kingdom, 1918-1922 | 1918-12-14 | 1922-10-26 | Ireland | |
| County Louth | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| County Waterford | Parliamentary constituency in the United Kingdom, 1918-1922 | 1918-12-14 | 1922-10-26 | Ireland | |
| County Waterford | Parliamentary constituency in the United Kingdom, 1802-1885 | 1801-01-01 | 1885-11-18 | Ireland | |
| County Wexford | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Coventry | Parliamentary constituency in the United Kingdom, 1885-1945 | 1885-11-24 | 1945-06-15 | Warwickshire | |
| Coventry | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Coventry East | Parliamentary constituency in the United Kingdom, 1945-1974 | 1945-07-05 | 1974-02-08 | ||
| Coventry East | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | West Midlands | ||
| Coventry North | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | ||
| Coventry North East | Parliamentary constituency in the United Kingdom, 1974-2024 | 1974-02-28 | 2024-05-30 | West Midlands | |
| Coventry North West | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | West Midlands | ||
| Coventry South | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | West Midlands | ||
| Coventry South | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | ||
| Coventry South East | Parliamentary constituency in the United Kingdom, 1974-1997 | 1974-02-28 | 1997-04-08 | Coventry | |
| Coventry South West | Parliamentary constituency in the United Kingdom, 1974-1997 | 1974-02-28 | 1997-04-08 | ||
| Coventry West | Parliamentary constituency in the United Kingdom, 1945-1950 | 1945-07-05 | 1950-02-03 | ||
| Cowdenbeath and Kirkcaldy | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Fife | ||
| Cramlington and Killingworth | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | North East England | ||
| Crawley | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | South East England | ||
| Crewe | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | ||
| Crewe and Nantwich | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | North West England | ||
| Cricklade | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Cricklade | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Cromartyshire | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Scotland | |
| Crosby | Parliamentary constituency in the United Kingdom, 1950-2010 | 1950-02-23 | 2010-04-12 | Merseyside | |
| Croydon | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Croydon Central | Parliamentary constituency in the United Kingdom, 1974-2024 | 1974-02-28 | 2024-05-30 | London Borough of Croydon | |
| Croydon East | Parliamentary constituency in the United Kingdom, 1950-1955 | 1950-02-23 | 1955-05-06 | ||
| Croydon East | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | London | ||
| Croydon North | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | London Borough of Croydon | |
| Croydon North | Parliamentary constituency in the United Kingdom, 1918-1955 | 1918-12-14 | 1955-05-06 | ||
| Croydon North East | Parliamentary constituency in the United Kingdom, 1955-1997 | 1955-05-26 | 1997-04-08 | London Borough of Croydon | |
| Croydon North West | Parliamentary constituency in the United Kingdom, 1955-1997 | 1955-05-26 | 1997-04-08 | London Borough of Croydon | |
| Croydon South | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | London Borough of Croydon | ||
| Croydon South | Parliamentary constituency in the United Kingdom, 1955-1974 | 1955-05-26 | 1974-02-08 | London Borough of Croydon | |
| Croydon South | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | London Borough of Croydon | |
| Croydon West | Parliamentary constituency in the United Kingdom, 1950-1955 | 1950-02-23 | 1955-05-06 | ||
| Croydon West | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | London | ||
| Cumberland | Parliamentary constituency in the United Kingdom, 1801–1832 | 1801 | 1832-12-03 | ||
| Cumbernauld and Kilsyth | Parliamentary constituency in the United Kingdom, 1983-2005 | 1983-06-09 | 2005-04-11 | Scotland | |
| Cumbernauld and Kirkintilloch | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | North Lanarkshire East Dunbartonshire |
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| Cumbernauld, Kilsyth and Kirkintilloch East | Parliamentary constituency in the United Kingdom, 2005-2024 | 2005-05-05 | 2024-05-30 | North Lanarkshire East Dunbartonshire |
|
| Cunninghame North | Parliamentary constituency in the United Kingdom, 1983-2005 | 1983-06-09 | 2005-04-11 | Scotland | |
| Cunninghame South | Parliamentary constituency in the United Kingdom, 1983-2005 | 1983-06-09 | 2005-04-11 | Scotland | |
| Cynon Valley | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | Rhondda Cynon Taf | |
| Dagenham | Parliamentary constituency in the United Kingdom, 1945-2010 | 1945-07-05 | 2010-04-12 | Dagenham | |
| Dagenham and Rainham | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | London Borough of Barking and Dagenham London Borough of Havering |
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| Darlington | Parliamentary constituency in the United Kingdom, 1868 onwards | 1868-11-17 | North East England | ||
| Dartford | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | South East England | ||
| Dartmouth | Parliamentary constituency in the United Kingdom, 1832-1868 | 1832-12-08 | 1868-11-11 | ||
| Dartmouth | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Darwen | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | ||
| Daventry | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | East Midlands | ||
| Daventry | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Davyhulme | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | ||
| Dearne Valley | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | ||
| Delyn | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | Flintshire | |
| Denbigh | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Wales | |
| Denbigh Boroughs | Parliamentary constituency in the United Kingdom, 1801-1918 | 1801 | 1918-11-25 | Wales | |
| Denbighshire | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | Wales | |
| Denbighshire | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Wales | |
| Denton and Reddish | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | North West England | |
| Deptford | Parliamentary constituency in the United Kingdom, 1885-1974 | 1885-11-24 | 1974-02-08 | ||
| Derby | Parliamentary constituency in the United Kingdom, 1801-1950 | 1801 | 1950-02-03 | Derbyshire | |
| Derby North | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | East Midlands | ||
| Derby South | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | East Midlands | ||
| Derbyshire | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Derbyshire Dales | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | East Midlands | ||
| Derbyshire Mid | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Derbyshire Southern | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Derbyshire Southern | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| Devizes | Parliamentary constituency in the United Kingdom, 1868-2024 | 1868-11-17 | 2024-05-30 | South West England | |
| Devizes | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Devon | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Devon Eastern | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | ||
| Devon Northern | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| Dewsbury | Parliamentary constituency in the United Kingdom, 1868-2024 | 1868-11-17 | 2024-05-30 | Yorkshire and the Humber | |
| Dewsbury and Batley | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Yorkshire and the Humber | ||
| Didcot and Wantage | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South East England | ||
| Don Valley | Parliamentary constituency in the United Kingdom, 1918-2024 | 1918-12-14 | 2024-05-30 | Yorkshire and the Humber | |
| Doncaster | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | Doncaster | |
| Doncaster Central | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | Yorkshire and the Humber | ||
| Doncaster East and the Isle of Axholme | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Yorkshire and the Humber | ||
| Doncaster North | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | Yorkshire and the Humber | ||
| Donegal | Parliamentary constituency in the United Kingdom, 1802-1885 | 1801-01-01 | 1885-11-18 | Ireland | |
| Dorchester | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | ||
| Dorchester | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Dorking | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | ||
| Dorking and Horley | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South East England | ||
| Dorset | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | Dorset | |
| Dorset | Parliamentary constituency in the United Kingdom (1801-1832) | 1801 | 1832 | ||
| Dover | Parliamentary constituency in the United Kingdom, 1885-2024 | 1885-11-24 | 2024-05-30 | South East England | |
| Dover | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Dover and Deal | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South East England | ||
| Down | Parliamentary constituency in the United Kingdom, 1922-1950 | 1922-11-15 | 1950-02-03 | Northern Ireland | |
| Down | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Down North | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| Down South | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| Downpatrick | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Downton | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Wiltshire | |
| Drogheda | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Droitwich | Parliamentary constituency in the United Kingdom, 1832-1918 | 1832-12-08 | 1918-11-25 | ||
| Droitwich | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Droitwich and Evesham | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | West Midlands | ||
| Droylsden | Parliamentary constituency in the United Kingdom, 1950-1955 | 1950-02-23 | 1955-05-06 | ||
| Dublin City | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Dublin Clontarf | Parliamentary constituency in the United Kingdom, 1918-1922 | 1918-12-14 | 1922-10-26 | Ireland | |
| Dublin College Green | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| Dublin County | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Dublin Harbour | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| Dublin Pembroke | Parliamentary constituency in the United Kingdom, 1918-1922 | 1918-12-14 | 1922-10-26 | Ireland | |
| Dublin Rathmines | Parliamentary constituency in the United Kingdom, 1918-1922 | 1918-12-14 | 1922-10-26 | Ireland | |
| Dublin St James's | Parliamentary constituency in the United Kingdom, 1918-1922 | 1918-12-14 | 1922-10-26 | Ireland | |
| Dublin St Michan's | Parliamentary constituency in the United Kingdom, 1918-1922 | 1918-12-14 | 1922-10-26 | Ireland | |
| Dublin St Patrick's | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| Dublin St Stephen's Green | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| Dublin University | Parliamentary constituency in the United Kingdom, 1832-1922 | 1832-12-08 | 1922-10-26 | Ireland | |
| Dublin University | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801-01-01 | 1832-12-03 | Ireland | |
| Dudley | Parliamentary constituency in the United Kingdom, 1832-1974 | 1832-12-08 | 1974-02-08 | ||
| Dudley | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | West Midlands | ||
| Dudley East | Parliamentary constituency in the United Kingdom, 1974-1997 | 1974-02-28 | 1997-04-08 | ||
| Dudley North | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | West Midlands | |
| Dudley South | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | West Midlands | |
| Dudley West | Parliamentary constituency in the United Kingdom, 1974-1997 | 1974-02-28 | 1997-04-08 | Dudley | |
| Dulwich | Parliamentary constituency in the United Kingdom, 1885-1997 | 1885-11-24 | 1997-04-08 | ||
| Dulwich and West Norwood | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | London Borough of Southwark London Borough of Lambeth |
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| Dumbarton | Parliamentary constituency in the United Kingdom, 1983-2005 | 1983-06-09 | 2005-04-11 | Scotland | |
| Dumbarton Burghs | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | Scotland | |
| Dumfries Burghs | Parliamentary constituency in the United Kingdom, 1801-1918 | 1801 | 1918-11-25 | Scotland | |
| Dumfries and Galloway | Parliamentary constituency in Dumfries and Galloway, Scotland, UK, 2005 onwards | 2005-05-05 | Dumfries and Galloway | ||
| Dumfriesshire | Parliamentary constituency in the United Kingdom, 1801-2005 | 1801 | 2005-04-11 | Dumfries and Galloway | |
| Dumfriesshire, Clydesdale and Tweeddale | Parliamentary constituency in the United Kingdom, 2005 onwards | 2005-05-05 | Dumfries and Galloway Scottish Borders South Lanarkshire |
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| Dunbartonshire | Parliamentary constituency in the United Kingdom, 1801-1950 | 1801 | 1950-02-03 | Scotland | |
| Dunbartonshire East | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | Scotland | |
| Dunbartonshire West | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | Scotland | |
| Dundalk | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Dundee | Parliamentary constituency in the United Kingdom, 1868-1950 | 1868-11-17 | 1950-02-03 | Scotland | |
| Dundee | Parliamentary constituency in the United Kingdom, 1832-1868 | 1832-12-08 | 1868-11-11 | Scotland | |
| Dundee Central | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Scotland | ||
| Dundee East | Parliamentary constituency in the United Kingdom, 1950-2024 | 1950-02-23 | 2024-05-30 | Dundee City Angus |
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| Dundee West | Parliamentary constituency in the United Kingdom, 1950-2024 | 1950-02-23 | 2024-05-30 | Dundee City Angus |
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| Dunfermline | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | Scotland | |
| Dunfermline Burghs | Parliamentary constituency in the United Kingdom, 1918-1974 | 1918-12-14 | 1974-02-08 | Fife | |
| Dunfermline East | Parliamentary constituency in the United Kingdom, 1983-2005 | 1983-06-09 | 2005-04-11 | Scotland | |
| Dunfermline West | Parliamentary constituency in the United Kingdom, 1983-2005 | 1983-06-09 | 2005-04-11 | Scotland | |
| Dunfermline and Dollar | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Scotland | ||
| Dunfermline and West Fife | Parliamentary constituency in Fife, Scotland, UK, 2005 onwards | 2005-05-05 | 2024-05-30 | Fife | |
| Dungannon | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Dungarvan | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Dunstable and Leighton Buzzard | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | East of England | ||
| Dunwich | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Dunwich | |
| Durham North Western | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Durham Northern | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| Dwyfor Meirionnydd | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | Gwynedd | ||
| Dysart Burghs | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Scotland | |
| Ealing | Parliamentary constituency in the United Kingdom, 1885-1945 | 1885-11-24 | 1945-06-15 | ||
| Ealing Acton | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Greater London | |
| Ealing Central and Acton | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | London Borough of Ealing | ||
| Ealing East | Parliamentary constituency in the United Kingdom, 1945-1950 | 1945-07-05 | 1950-02-03 | ||
| Ealing North | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | London Borough of Ealing | ||
| Ealing South | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | ||
| Ealing Southall | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | London Borough of Ealing | ||
| Ealing West | Parliamentary constituency in the United Kingdom, 1945-1950 | 1945-07-05 | 1950-02-03 | ||
| Ealing, Acton and Shepherd's Bush | Parliamentary constituency in the United Kingdom, 1997–2010 | 1997-05-01 | 2010-04-12 | Greater London | |
| Earley and Woodley | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South East England | ||
| Easington | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | North East England | ||
| East Aberdeenshire | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | Scotland | |
| East Angus | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Scotland | |
| East Antrim | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | Northern Ireland | ||
| East Berkshire | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Berkshire | |
| East Carmarthenshire | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Wales | |
| East Cavan | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| East Cheshire | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | ||
| East Clare | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| East Cork | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| East Cornwall | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| East Cumberland | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| East Denbighshire | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Wales | |
| East Derbyshire | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | ||
| East Devon | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | South West England | |
| East Donegal | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| East Dorset | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| East Down | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| East Dunbartonshire | Parliamentary constituency in East Dunbartonshire, Scotland, UK, 2005 onwards | 2005-05-05 | 2024-05-30 | East Dunbartonshire | |
| East Essex | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | Essex | |
| East Fife | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | Scotland | |
| East Flintshire | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | Wales | |
| East Galway | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| East Glamorganshire | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Wales | |
| East Gloucestershire | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| East Grinstead | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | West Sussex | |
| East Grinstead | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| East Grinstead and Uckfield | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South East England | ||
| East Ham | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | London Borough of Newham | ||
| East Ham North | Parliamentary constituency in the United Kingdom, 1918-1974 | 1918-12-14 | 1974-02-08 | ||
| East Ham South | Parliamentary constituency in the United Kingdom, 1918-1974 | 1918-12-14 | 1974-02-08 | ||
| East Hampshire | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | South East England | ||
| East Hertfordshire | Parliamentary constituency in the United Kingdom, 1955-1983 | 1955-05-26 | 1983-05-13 | ||
| East Kent | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| East Kerry | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| East Kilbride | Parliamentary constituency in the United Kingdom, 1974-2005 | 1974-02-28 | 2005-04-11 | Scotland | |
| East Kilbride and Strathaven | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Scotland | ||
| East Kilbride, Strathaven and Lesmahagow | Parliamentary constituency in South Lanarkshire, Scotland, UK, 2005 onwards | 2005-05-05 | 2024-05-30 | South Lanarkshire | |
| East Limerick | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| East Lindsey | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | ||
| East Londonderry | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | Northern Ireland | ||
| East Looe | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| East Lothian | Parliamentary constituency in East Lothian, Scotland, UK, 1983-2024 | 1983-06-09 | 2024-05-30 | East Lothian | |
| East Mayo | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| East Norfolk | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| East Northamptonshire | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| East Perthshire | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Scotland | |
| East Renfrewshire | Parliamentary constituency in East Renfrewshire, Scotland, UK, 2005 onwards | 2005-05-05 | East Renfrewshire | ||
| East Retford | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Nottinghamshire | |
| East Riding of Yorkshire | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| East Somerset | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| East Somerset | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| East Staffordshire | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | ||
| East Suffolk | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| East Surrey | Parliamentary constituency in the United Kingdom, 1918 onwards | 1918-12-14 | South East England | ||
| East Sussex | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| East Thanet | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Thanet | ||
| East Tipperary | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| East Tyrone | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Ireland | |
| East Waterford | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Ireland | |
| East Wicklow | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| East Wiltshire | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South West England | ||
| East Worcestershire | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| East Worcestershire | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| East Worthing and Shoreham | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | South East England | ||
| East Yorkshire | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | Yorkshire and the Humber | |
| Eastbourne | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | South East England | ||
| Eastern West Riding of Yorkshire | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | ||
| Eastleigh | Parliamentary constituency in the United Kingdom, 1955 onwards | 1955-05-26 | South East England | ||
| Eastwood | Parliamentary constituency in the United Kingdom, 1983-2005 | 1983-06-09 | 2005-04-11 | Scotland | |
| Ebbw Vale | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Wales | |
| Eccles | Parliamentary constituency in the United Kingdom, 1885-2010 | 1885-11-24 | 2010-04-12 | Greater Manchester | |
| Eddisbury | Parliamentary constituency in the United Kingdom, 1885-2024 | 1885 | 2024-05-30 | North West England | |
| Eddisbury | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Edinburgh | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | City of Edinburgh | |
| Edinburgh | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Scotland | |
| Edinburgh Central | Parliamentary constituency in the United Kingdom, 1885-2005 | 1885-11-24 | 2005-04-11 | Scotland | |
| Edinburgh East | parliamentary constituency in Edinburgh, Scotland, UK, 2005 onwards | 2005-05-05 | 2024-05-30 | City of Edinburgh | |
| Edinburgh East | Parliamentary constituency in the United Kingdom, 1885-1997 | 1885-11-24 | 1997-04-08 | Scotland | |
| Edinburgh East and Musselburgh | Parliamentary constituency in the United Kingdom, 1997-2005 | 1997-05-01 | 2005-04-11 | Scotland | |
| Edinburgh East and Musselburgh | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Scotland | ||
| Edinburgh Leith | Parliamentary constituency in the United Kingdom, 1950-1997 | 1950-02-23 | 1997-04-08 | Scotland | |
| Edinburgh North | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Scotland | |
| Edinburgh North and Leith | parliamentary constituency in Edinburgh, Scotland, UK, 1997 onwards | 1997-05-01 | City of Edinburgh | ||
| Edinburgh Pentlands | Parliamentary constituency in the United Kingdom, 1950-2005 | 1950-02-23 | 2005-04-11 | Scotland | |
| Edinburgh South | Parliamentary constituency in Edinburgh, Scotland, UK, 1885 onwards | 1885-11-24 | City of Edinburgh | ||
| Edinburgh South West | Parliamentary constituency in Edinburgh, Scotland, UK, 2005 onwards | 2005-05-05 | City of Edinburgh | ||
| Edinburgh West | parliamentary constituency in Edinburgh, Scotland, UK, 1885 onwards | 1885-11-24 | City of Edinburgh | ||
| Edinburgh and St Andrews Universities | Parliamentary constituency in the United Kingdom, 1868-1918 | 1868-11-17 | 1918-11-25 | Scotland | |
| Edmonton | Parliamentary constituency in the United Kingdom, 1918-2024 | 1918-12-14 | 2024-05-30 | London Borough of Enfield | |
| Edmonton and Winchmore Hill | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | London | ||
| Egremont | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Eifion | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Wales | |
| Elgin Burghs | Parliamentary constituency in the United Kingdom, 1801-1918 | 1801 | 1918-11-25 | Scotland | |
| Elginshire | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Scotland | |
| Elginshire and Nairnshire | Parliamentary constituency in the United Kingdom, 1832-1918 | 1832-12-08 | 1918-11-25 | Scotland | |
| Elland | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Ellesmere Port and Bromborough | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | North West England | ||
| Ellesmere Port and Neston | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | North West England | |
| Elmet | Parliamentary constituency in the United Kingdom, 1983-2010 | 1983-06-09 | 2010-04-12 | West Yorkshire | |
| Elmet and Rothwell | Parliamentary constituency in the United Kingdom, 2010-2024 | 2010-05-06 | 2024-05-30 | Yorkshire and the Humber | |
| Eltham | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | Royal Borough of Greenwich | |
| Eltham and Chislehurst | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | London | ||
| Ely and East Cambridgeshire | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | East of England | ||
| Enfield | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Enfield East | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | ||
| Enfield North | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | London Borough of Enfield | ||
| Enfield Southgate | Parliamentary constituency in the United Kingdom, 1950-2024 | 1950-02-23 | 2024-05-30 | London Borough of Enfield | |
| Enfield West | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | ||
| Ennis | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Enniskillen | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Epping | Parliamentary constituency in the United Kingdom, 1885-1974 | 1885-11-24 | 1974-02-08 | Essex | |
| Epping Forest | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | East of England | ||
| Epsom | Parliamentary constituency in the United Kingdom, 1885-1974 | 1885-11-24 | 1974-02-08 | ||
| Epsom and Ewell | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | South East England | ||
| Erewash | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | East Midlands | ||
| Erith and Crayford | Parliamentary constituency in the United Kingdom, 1955-1997 | 1955-05-26 | 1997-04-08 | ||
| Erith and Thamesmead | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | London Borough of Bexley | ||
| Esher | Parliamentary constituency in the United Kingdom, 1950-1997 | 1950-02-23 | 1997-04-08 | Surrey | |
| Esher and Walton | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | South East England | ||
| Eskdale | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Essex | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Essex | |
| Essex Northern | Parliamentary constituency in the United Kingdom, 1832-1868 | 1832-12-10 | 1868-11-11 | ||
| Essex South Eastern | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Eton and Slough | Parliamentary constituency in the United Kingdom, 1945-1983 | 1945-07-05 | 1983-05-13 | ||
| Evesham | Parliamentary constituency in the United Kingdom, 1868-1950 | 1868-11-17 | 1950-02-03 | ||
| Evesham | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Exeter | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | South West England | ||
| Exeter | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Exmouth and Exeter East | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South West England | ||
| Eye | Parliamentary constituency in the United Kingdom, 1832-1983 | 1832-12-08 | 1983-05-13 | Suffolk | |
| Eye | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Falkirk | Parliamentary constituency in Falkirk, Scotland, UK, 2005 onwards | 2005-05-05 | Falkirk | ||
| Falkirk Burghs | Parliamentary constituency in the United Kingdom, 1832-1918 | 1832-12-08 | 1918-11-25 | Scotland | |
| Falkirk East | Parliamentary constituency in the United Kingdom, 1983-2005 | 1983-06-09 | 2005-04-11 | Scotland | |
| Falkirk West | Parliamentary constituency in the United Kingdom, 1983-2005 | 1983-06-09 | 2005-04-11 | Scotland | |
| Falmouth and Camborne | Parliamentary constituency in the United Kingdom, 1950-2010 | 1950-02-23 | 2010-04-12 | Cornwall | |
| Fareham | Parliamentary constituency in the United Kingdom, 1974-2024 | 1974-02-28 | 2024-05-30 | South East England | |
| Fareham | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Fareham and Waterlooville | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South East England | ||
| Farnham | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | ||
| Farnham and Bordon | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South East England | ||
| Farnworth | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | ||
| Faversham | Parliamentary constituency in the United Kingdom, 1885-1997 | 1885-11-24 | 1997-04-08 | ||
| Faversham and Mid Kent | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | South East England | ||
| Feltham | Parliamentary constituency in the United Kingdom, 1955-1974 | 1955-05-26 | 1974-02-08 | ||
| Feltham and Heston | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | London Borough of Hounslow | ||
| Fermanagh | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Fermanagh and South Tyrone | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | Northern Ireland | ||
| Fermanagh and Tyrone | Parliamentary constituency in the United Kingdom, 1922-1950 | 1922-11-15 | 1950-02-03 | Northern Ireland | |
| Fife | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Scotland | |
| Filton and Bradley Stoke | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | South West England | ||
| Finchley | Parliamentary constituency in the United Kingdom, 1918-1997 | 1918-12-14 | 1997-04-08 | Greater London | |
| Finchley and Golders Green | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | London Borough of Barnet | ||
| Finsbury | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Finsbury | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| Finsbury Central | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Finsbury East | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Flint Boroughs | Parliamentary constituency in the United Kingdom, 1801-1918 | 1801 | 1918-11-25 | Wales | |
| Flintshire | Parliamentary constituency in the United Kingdom, 1801-1950 | 1801 | 1950-02-03 | Wales | |
| Folkestone and Hythe | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | South East England | ||
| Forest of Dean | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | South West England | ||
| Forest of Dean | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Forfarshire | Parliamentary constituency in the United Kingdom, 1801-1950 | 1801 | 1950-02-03 | Angus | |
| Fowey | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Foyle | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | Northern Ireland | ||
| Frome | Parliamentary constituency in the United Kingdom, 1832-1950 | 1832-12-08 | 1950-02-03 | ||
| Frome and East Somerset | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South West England | ||
| Fulham | Parliamentary constituency in the United Kingdom, 1955-1997 | 1955-05-26 | 1997-04-08 | Greater London | |
| Fulham | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Fulham East | Parliamentary constituency in the United Kingdom, 1918-1955 | 1918-12-14 | 1955-05-06 | ||
| Fulham West | Parliamentary constituency in the United Kingdom, 1918-1955 | 1918-12-14 | 1955-05-06 | ||
| Fylde | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | North West England | ||
| Fylde | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Fylde North | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | ||
| Fylde South | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | ||
| Gainsborough | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | East Midlands | ||
| Gainsborough | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | ||
| Gainsborough and Horncastle | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | ||
| Galloway | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Scotland | |
| Galloway and Upper Nithsdale | Parliamentary constituency in the United Kingdom, 1983-2005 | 1983-06-09 | 2005-04-11 | Scotland | |
| Galway Borough | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Ireland | |
| Galway Borough | Parliamentary constituency in the United Kingdom (1832-1885) | 1832-12-08 | 1885-11-18 | Ireland | |
| Galway Borough | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Ireland | |
| Galway Connemara | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| Galway County | Parliamentary constituency in the United Kingdom, 1801–1885 | 1801 | 1885-11-18 | Ireland | |
| Garston and Halewood | Parliamentary constituency in the United Kingdom, 2010-2024 | 2010-05-06 | 2024-05-30 | North West England | |
| Gateshead | Parliamentary constituency in the United Kingdom, 2010-2024 | 2010-05-06 | 2024-05-30 | North East England | |
| Gateshead | Parliamentary constituency in the United Kingdom, 1832-1950 | 1832-12-08 | 1950-02-03 | ||
| Gateshead Central and Whickham | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | North East England | ||
| Gateshead East | Parliamentary constituency in the United Kingdom, 1950-1997 | 1950-02-23 | 1997-04-08 | Tyne and Wear | |
| Gateshead East and Washington West | Parliamentary constituency in the United Kingdom, 1997-2010 | 1997-05-01 | 2010-04-12 | Tyne and Wear | |
| Gateshead West | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | County Durham | |
| Gatton | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Gedling | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | East Midlands | ||
| Gillingham | Parliamentary constituency in the United Kingdom, 1918-2010 | 1918-12-14 | 2010-04-12 | Kent | |
| Gillingham and Rainham | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | South East England | ||
| Glamorganshire | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-10 | 1885-11-18 | Glamorgan Wales |
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| Glamorganshire | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801-01-01 | 1832-12-03 | Glamorgan Wales |
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| Glanford and Scunthorpe | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Humberside | |
| Glasgow | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | Glasgow City | |
| Glasgow | Parliamentary constituency in the United Kingdom (1832-1868) | 1832-12-08 | 1868-11-11 | Scotland | |
| Glasgow Anniesland | Parliamentary constituency in the United Kingdom, 1997-2005 | 1997-05-01 | 2005-04-11 | Scotland | |
| Glasgow Baillieston | Parliamentary constituency in the United Kingdom, 1997-2005 | 1997-05-01 | 2005-04-11 | Scotland | |
| Glasgow Blackfriars and Hutchesontown | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Scotland | |
| Glasgow Bridgeton | Parliamentary constituency in the United Kingdom, 1885-1974 | 1885-11-24 | 1974-02-08 | Scotland | |
| Glasgow Camlachie | Parliamentary constituency in the United Kingdom, 1885-1955 | 1885-11-24 | 1955-05-06 | Scotland | |
| Glasgow Cathcart | Parliamentary constituency in the United Kingdom, 1918-2005 | 1918-12-14 | 2005-04-11 | Glasgow City | |
| Glasgow Central | Parliamentary constituency in Glasgow, Scotland, UK, 2005 onwards | 2005-05-05 | 2024-05-30 | Glasgow City | |
| Glasgow Central | Parliamentary constituency in the United Kingdom, 1885-1997 | 1885-11-24 | 1997-04-08 | Scotland | |
| Glasgow College | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Scotland | |
| Glasgow Craigton | Parliamentary constituency in the United Kingdom, 1955-1983 | 1955-05-26 | 1983-05-13 | Scotland | |
| Glasgow East | Parliamentary constituency in Glasgow, Scotland, UK, 2005 onwards | 2005-05-05 | Glasgow City | ||
| Glasgow Garscadden | Parliamentary constituency in the United Kingdom, 1974-1997 | 1974-02-28 | 1997-04-08 | Scotland | |
| Glasgow Gorbals | Parliamentary constituency in the United Kingdom, 1918-1974 | 1918-12-14 | 1974-02-08 | Scotland Glasgow |
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| Glasgow Govan | Parliamentary constituency in the United Kingdom, 1885-2005 | 1885-11-24 | 2005-04-11 | Scotland | |
| Glasgow Hillhead | Parliamentary constituency in the United Kingdom, 1918-1997 | 1918-12-14 | 1997-04-08 | Scotland | |
| Glasgow Kelvin | Parliamentary constituency in the United Kingdom, 1997-2005 | 1997-05-01 | 2005-04-11 | Scotland | |
| Glasgow Kelvingrove | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Scotland | |
| Glasgow Maryhill | Parliamentary constituency in the United Kingdom, 1918-2005 | 1918-12-14 | 2005-04-11 | Scotland | |
| Glasgow North | Parliamentary constituency in Glasgow, Scotland, UK, 2005 onwards | 2005-05-05 | Glasgow City | ||
| Glasgow North East | parliamentary constituency in Glasgow, Scotland, UK, 2005 onwards | 2005-05-05 | Glasgow City | ||
| Glasgow North West | Parliamentary constituency in Glasgow, Scotland, UK, 2005 onwards | 2005-05-05 | 2024-05-30 | Glasgow City | |
| Glasgow Partick | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | Scotland | |
| Glasgow Pollok | Parliamentary constituency in the United Kingdom, 1918-2005 | 1918-12-14 | 2005-04-11 | Glasgow City | |
| Glasgow Provan | Parliamentary constituency in the United Kingdom, 1955-1997 | 1955-05-26 | 1997-04-08 | Scotland | |
| Glasgow Queen's Park | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | Scotland | |
| Glasgow Scotstoun | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | Scotland | |
| Glasgow Shettleston | Parliamentary constituency in the United Kingdom, 1918-2005 | 1918-12-14 | 2005-04-11 | Scotland | |
| Glasgow South | Parliamentary constituency in Glasgow, Scotland, UK, 2005 onwards | 2005-05-05 | Glasgow City | ||
| Glasgow South West | Parliamentary constituency in Glasgow, Scotland, UK, 2005 onwards | 2005-05-05 | Glasgow City | ||
| Glasgow Springburn | Parliamentary constituency in the United Kingdom, 1918-2005 | 1918-12-14 | 2005-04-11 | Scotland | |
| Glasgow St Rollox | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | Glasgow City | |
| Glasgow Tradeston | Parliamentary constituency in the United Kingdom, 1885-1955 | 1885-11-24 | 1955-05-06 | Scotland | |
| Glasgow West | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Scotland | ||
| Glasgow Woodside | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | Scotland | |
| Glasgow and Aberdeen Universities | Parliamentary constituency in the United Kingdom, 1868-1918 | 1868-11-17 | 1918-11-25 | Scotland | |
| Glastonbury and Somerton | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South West England | ||
| Glenrothes | Parliamentary constituency in Fife, Scotland, UK, 2005-2024 | 2005-05-05 | 2024-05-30 | Fife | |
| Glenrothes and Mid Fife | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Fife | ||
| Gloucester | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | South West England | ||
| Gloucester | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Gloucestershire | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Gloucestershire | |
| Gloucestershire Western | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| Godalming and Ash | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South East England | ||
| Goole | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | Goole | |
| Goole and Pocklington | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Yorkshire and the Humber | ||
| Gordon | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | Aberdeen City Aberdeenshire |
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| Gordon and Buchan | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Scotland | ||
| Gorton and Denton | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | North West England | ||
| Gosport | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | South East England | ||
| Gosport and Fareham | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | ||
| Gower | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | Swansea | ||
| Grampound | Parliamentary constituency in the United Kingdom, 1801-1826 | 1801 | 1826-06-02 | Cornwall | |
| Grantham | Parliamentary constituency in the United Kingdom, 1885-1997 | 1885-11-24 | 1997-04-08 | Grantham | |
| Grantham | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Grantham and Bourne | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | East Midlands | ||
| Grantham and Stamford | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | East Midlands | |
| Gravesend | Parliamentary constituency in the United Kingdom, 1868-1983 | 1868-11-17 | 1983-05-13 | ||
| Gravesham | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | South East England | ||
| Great Bedwyn | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Wiltshire | |
| Great Grimsby | Parliamentary constituency in the United Kingdom, 1832-2024 | 1832-12-08 | 2024-05-30 | Yorkshire and the Humber | |
| Great Grimsby | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Great Grimsby and Cleethorpes | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Yorkshire and the Humber | ||
| Great Marlow | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | ||
| Great Marlow | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Great Yarmouth | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | East of England | ||
| Great Yarmouth | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Greenock | Parliamentary constituency in the United Kingdom, 1832-1974 | 1832-12-08 | 1974-02-08 | Scotland | |
| Greenock and Inverclyde | Parliamentary constituency in the United Kingdom, 1997-2005 | 1997-05-01 | 2005-04-11 | Scotland | |
| Greenock and Port Glasgow | Parliamentary constituency in the United Kingdom, 1974-1997 | 1974-02-28 | 1997-04-08 | Scotland | |
| Greenwich | Parliamentary constituency in the United Kingdom, 1885-1997 | 1885-11-24 | 1997-04-08 | Greater London | |
| Greenwich | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| Greenwich and Woolwich | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | Royal Borough of Greenwich | ||
| Guildford | Parliamentary constituency in the United Kingdom, 1868 onwards | 1868-11-17 | South East England | ||
| Guildford | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Hackney | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | ||
| Hackney Central | Parliamentary constituency in the United Kingdom, 1955-1983 | 1955-05-26 | 1983-05-13 | London Borough of Hackney | |
| Hackney Central | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Hackney North | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Hackney North and Stoke Newington | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | London Borough of Hackney | ||
| Hackney South | Parliamentary constituency in the United Kingdom, 1885-1955 | 1885-11-24 | 1955-05-06 | ||
| Hackney South and Shoreditch | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | London Borough of Hackney | ||
| Haddington Burghs | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Scotland | |
| Haddingtonshire | Parliamentary constituency in the United Kingdom, 1801-1918 | 1801 | 1918-11-25 | East Lothian | |
| Haggerston | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Halesowen | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | West Midlands | ||
| Halesowen and Rowley Regis | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | West Midlands | |
| Halesowen and Stourbridge | Parliamentary constituency in the United Kingdom, 1974-1997 | 1974-02-28 | 1997-04-08 | ||
| Halifax | Parliamentary constituency in the United Kingdom, 1918 onwards | 1918-12-14 | Yorkshire and the Humber | ||
| Halifax | Parliamentary constituency in the United Kingdom, 1832-1918 | 1832-12-08 | 1918-11-25 | ||
| Hallamshire | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Haltemprice | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | ||
| Haltemprice and Howden | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | Yorkshire and the Humber | |
| Halton | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | North West England | |
| Hamble Valley | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South East England | ||
| Hamilton | Parliamentary constituency in the United Kingdom, 1918-1997 | 1918-12-14 | 1997-04-08 | Scotland | |
| Hamilton North and Bellshill | Parliamentary constituency in the United Kingdom, 1997-2005 | 1997-05-01 | 2005-04-11 | Scotland | |
| Hamilton South | Parliamentary constituency in the United Kingdom, 1997-2005 | 1997-05-01 | 2005-04-11 | Scotland | |
| Hamilton and Clyde Valley | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Scotland | ||
| Hammersmith | Parliamentary constituency in the United Kingdom, 2010-2024 | 2010-05-06 | 2024-05-30 | London Borough of Hammersmith and Fulham | |
| Hammersmith | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | London | |
| Hammersmith | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | London | |
| Hammersmith North | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | London | |
| Hammersmith South | Parliamentary constituency in the United Kingdom, 1918–1955 | 1918-12-14 | 1955-05-06 | London | |
| Hammersmith and Chiswick | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | London | ||
| Hammersmith and Fulham | Parliamentary constituency in the United Kingdom, 1997-2010 | 1997-05-01 | 2010-04-12 | London | |
| Hampshire | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Hampshire | |
| Hampstead | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | ||
| Hampstead and Highgate | Parliamentary constituency in the United Kingdom, 1983-2010 | 1983-06-09 | 2010-04-12 | London Borough of Camden | |
| Hampstead and Highgate | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | London Borough of Camden | ||
| Hampstead and Kilburn | Parliamentary constituency in the United Kingdom, 2010-2024 | 2010-05-06 | 2024-05-30 | London Borough of Camden London Borough of Brent |
|
| Hanley | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Harborough | Parliamentary constituency in the United Kingdom, 1885-2024 | 1885-11-24 | 2024-05-30 | East Midlands | |
| Harborough, Oadby and Wigston | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | East Midlands | ||
| Harlow | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | East of England | ||
| Harpenden and Berkhamsted | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | East of England | ||
| Harrogate | Parliamentary constituency in the United Kingdom, 1950-1997 | 1950-02-23 | 1997-04-08 | Harrogate | |
| Harrogate and Knaresborough | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | Yorkshire and the Humber | ||
| Harrow | Parliamentary constituency in the United Kingdom, 1885-1945 | 1885-11-24 | 1945-06-15 | ||
| Harrow Central | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | ||
| Harrow East | Parliamentary constituency in the United Kingdom, 1945 onwards | 1945-07-05 | London Borough of Harrow | ||
| Harrow West | Parliamentary constituency in the United Kingdom, 1945 onwards | 1945-07-05 | London Borough of Harrow | ||
| Hartlepool | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | North East England | ||
| Harwich | Parliamentary constituency in the United Kingdom, 1868–2010 | 1868-11-17 | 2010-04-12 | Essex | |
| Harwich | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Harwich and North Essex | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | East of England | ||
| Haslemere | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Hastings | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | ||
| Hastings | Parliamentary constituency in the United Kingdom, 1707-1885 | 1707 | 1885-11-18 | ||
| Hastings and Rye | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | South East England | ||
| Havant | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | South East England | ||
| Havant and Waterloo | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | ||
| Haverfordwest | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Wales | |
| Hawick Burghs | Parliamentary constituency in the United Kingdom, 1868-1918 | 1868-11-17 | 1918-11-25 | Scotland | |
| Hayes and Harlington | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | London Borough of Hillingdon | ||
| Hazel Grove | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | North West England | ||
| Hedon | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Helston | Parliamentary constituency in the United Kingdom, 1832–1885 | 1832-12-08 | 1885-11-18 | Cornwall | |
| Helston | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Hemel Hempstead | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | East of England | ||
| Hemel Hempstead | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | ||
| Hemsworth | Parliamentary constituency in the United Kingdom, 1918-2024 | 1918-12-14 | 2024-05-30 | Yorkshire and the Humber | |
| Hendon | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | London Borough of Barnet | ||
| Hendon | Parliamentary constituency in the United Kingdom, 1918-1945 | 1918-12-14 | 1945-06-15 | ||
| Hendon North | Parliamentary constituency in the United Kingdom, 1945-1997 | 1945-07-05 | 1997-04-08 | ||
| Hendon South | Parliamentary constituency in the United Kingdom, 1945-1997 | 1945-07-05 | 1997-04-08 | Hendon | |
| Henley | Parliamentary constituency in the United Kingdom, 1885-2024 | 1885-11-24 | 2024-05-30 | South East England | |
| Henley and Thame | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South East England | ||
| Hereford | Parliamentary constituency in the United Kingdom, 1885-2010 | 1885-11-24 | 2010-04-12 | Hereford | |
| Hereford | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Hereford and South Herefordshire | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | West Midlands | ||
| Herefordshire | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | Herefordshire | |
| Herefordshire | Parliamentary constituency in the United Kingdom (1801-1832) | 1801-01-01 | 1832 | ||
| Herne Bay and Sandwich | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South East England | ||
| Hertford | Parliamentary constituency in the United Kingdom, 1868-1974 | 1868-11-17 | 1974-02-08 | Hertford | |
| Hertford | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Hertford and Stevenage | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | Hertfordshire | |
| Hertford and Stortford | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | East of England | ||
| Hertfordshire | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801-01-01 | 1832-12-03 | Hertfordshire | |
| Hertfordshire constituency | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | Hertfordshire | |
| Hertsmere | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | East of England | ||
| Heston and Isleworth | Parliamentary constituency in the United Kingdom, 1945-1974 | 1945-07-05 | 1974-02-08 | ||
| Hexham | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | North East England | ||
| Heytesbury | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Wiltshire | |
| Heywood | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Heywood and Middleton | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | North West England | |
| Heywood and Middleton North | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | North West England | ||
| Heywood and Radcliffe | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Heywood and Royton | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | ||
| High Peak | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | East Midlands | ||
| Higham Ferrers | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Northamptonshire | |
| Hinckley and Bosworth | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | East Midlands | ||
| Hindon | Parliamentary constituency in the United Kingdom, 1448-1832 | 1448 | 1832-12-03 | ||
| Hitchin | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | Hitchin | |
| Hitchin | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Hitchin | ||
| Hitchin and Harpenden | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | East of England | |
| Holborn | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Holborn and St Pancras | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | London Borough of Camden | ||
| Holborn and St Pancras South | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | ||
| Holderness | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Holland with Boston | Parliamentary constituency in the United Kingdom, 1918-1997 | 1918-12-14 | 1997-04-08 | ||
| Holmfirth | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Honiton | Parliamentary constituency in the United Kingdom, 1885-1997 | 1885-11-24 | 1997-04-08 | Devon | |
| Honiton | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Honiton and Sidmouth | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South West England | ||
| Horncastle | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | ||
| Hornchurch | Parliamentary constituency in the United Kingdom, 1945-2010 | 1945-07-05 | 2010-04-12 | Greater London | |
| Hornchurch and Upminster | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | London Borough of Havering | ||
| Hornsey | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | ||
| Hornsey and Friern Barnet | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | London | ||
| Hornsey and Wood Green | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | London Borough of Haringey | |
| Horsham | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | South East England | ||
| Horsham | Parliamentary constituency in the United Kingdom, 1945-1974 | 1945-07-05 | 1974-02-08 | West Sussex | |
| Horsham | Parliamentary constituency in the United Kingdom, 1832-1918 | 1832-12-08 | 1918-11-25 | ||
| Horsham | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832 | ||
| Horsham and Crawley | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | West Sussex | |
| Horsham and Worthing | Parliamentary constituency in the United Kingdom, 1918-1945 | 1918-12-14 | 1945-06-15 | ||
| Houghton and Sunderland South | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | North East England | ||
| Houghton and Washington East | Parliamentary constituency in the United Kingdom, 1983-2010 | 1983-06-09 | 2010-04-12 | Tyne and Wear | |
| Houghton-le-Spring | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | County Durham | |
| Hove | Parliamentary constituency in the United Kingdom, 1950-2024 | 1950-02-23 | 2024-05-30 | South East England | |
| Hove and Portslade | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South East England | ||
| Howden | Parliamentary constituency in the United Kingdom, 1955-1983 | 1955-05-26 | 1983-05-13 | ||
| Howdenshire | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Hoxton | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Huddersfield | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | Yorkshire and the Humber | ||
| Huddersfield | Parliamentary constituency in the United Kingdom, 1832-1950 | 1832-12-08 | 1950-02-03 | ||
| Huddersfield East | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | Huddersfield | |
| Huddersfield West | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | ||
| Huntingdon | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | East of England | ||
| Huntingdon | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Huntingdon | Parliamentary constituency in the United Kingdom, 1868-1918 | 1868-11-17 | 1918-11-25 | ||
| Huntingdonshire | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Huntingdonshire | |
| Huntingdonshire | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Huntingdonshire | |
| Huyton | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | ||
| Hyde | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Hyndburn | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | North West England | ||
| Hythe | Parliamentary constituency in the United Kingdom, 1832-1950 | 1832-12-08 | 1950-02-03 | ||
| Hythe | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Ilchester | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Somerset | |
| Ilford | Parliamentary constituency in the United Kingdom, 1918-1945 | 1918-12-14 | 1945-06-15 | ||
| Ilford North | Parliamentary constituency in the United Kingdom, 1945 onwards | 1945-07-05 | London Borough of Redbridge | ||
| Ilford South | Parliamentary constituency in the United Kingdom, 1945 onwards | 1945-07-05 | London Borough of Redbridge | ||
| Ilkeston | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | ||
| Ince | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | ||
| Inverclyde | Parliamentary constituency in Inverclyde, Scotland, UK, 2005 onwards | 2005-05-05 | 2024-05-30 | Inverclyde | |
| Inverclyde and Renfrewshire West | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Scotland | ||
| Inverness | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Scotland | |
| Inverness Burghs | Parliamentary constituency in the United Kingdom, 1801-1918 | 1801 | 1918-11-25 | Scotland | |
| Inverness East, Nairn and Lochaber | Parliamentary constituency in the United Kingdom, 1997-2005 | 1997-05-01 | 2005-04-11 | Scotland | |
| Inverness, Nairn and Lochaber | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Scotland | |
| Inverness, Nairn, Badenoch and Strathspey | Parliamentary constituency in Highland, Scotland, UK, 2005 onwards | 2005-05-05 | 2024-05-30 | Highland | |
| Inverness, Skye and West Ross-shire | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Scotland | ||
| Inverness-shire | Parliamentary constituency in the United Kingdom, 1801-1918 | 1801 | 1918-11-25 | Scotland | |
| Ipswich | Parliamentary constituency in the United Kingdom, 1918 onwards | 1918-12-14 | East of England | ||
| Ipswich | Parliamentary constituency in the United Kingdom, 1801-1918 | 1801 | 1918-11-25 | ||
| Isle of Ely | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | ||
| Isle of Thanet | Parliamentary constituency in the United Kingdom, 1885-1974 | 1885-11-24 | 1974-02-08 | ||
| Isle of Wight | Parliamentary constituency in the United Kingdom, 1832-2024 | 1832-12-08 | 2024-05-30 | Isle of Wight | |
| Isle of Wight East | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South East England | ||
| Isle of Wight West | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South East England | ||
| Islington Central | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | ||
| Islington East | Parliamentary constituency in the United Kingdom, 1885-1974 | 1885-11-24 | 1974-02-08 | London | |
| Islington North | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | London Borough of Islington | ||
| Islington South | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | London | |
| Islington South West | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | ||
| Islington South and Finsbury | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | London Borough of Islington | ||
| Islington West | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | London | |
| Islwyn | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | Caerphilly County Borough | |
| Jarrow | Parliamentary constituency in the United Kingdom, 1885-2024 | 1885-11-24 | 2024-05-30 | North East England | |
| Jarrow and Gateshead East | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | North East England | ||
| Keighley | Parliamentary constituency in the United Kingdom, 1885-2024 | 1885-11-24 | 2024-05-30 | Yorkshire and the Humber | |
| Keighley and Ilkley | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Yorkshire and the Humber | ||
| Kendal | Parliamentary constituency in the United Kingdom, 1832-1918 | 1832-12-08 | 1918-11-25 | ||
| Kenilworth and Southam | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | West Midlands | ||
| Kennington | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Kensington | Parliamentary constituency in the United Kingdom, 2010-2024 | 2010-05-06 | 2024-05-30 | Royal Borough of Kensington and Chelsea | |
| Kensington | Parliamentary constituency in the United Kingdom, 1974-1997 | 1974-02-28 | 1997-04-08 | Royal Borough of Kensington and Chelsea | |
| Kensington North | Parliamentary constituency in the United Kingdom, 1885-1974 | 1885-11-24 | 1974-02-08 | ||
| Kensington South | Parliamentary constituency in the United Kingdom, 1885-1974 | 1885-11-24 | 1974-02-08 | ||
| Kensington and Bayswater | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | London | ||
| Kensington and Chelsea | Parliamentary constituency in the United Kingdom, 1997-2010 | 1997-05-01 | 2010-04-12 | Royal Borough of Kensington and Chelsea | |
| Kent | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Kent | |
| Kerry | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Kettering | Parliamentary constituency in the United Kingdom, 1918 onwards | 1918-12-14 | East Midlands | ||
| Kidderminster | Parliamentary constituency in the United Kingdom, 1832-1983 | 1832-12-08 | 1983-05-13 | Kidderminster | |
| Kildare | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Kilkenny City | Parliamentary constituency in the United Kingdom, 1801-1918 | 1801 | 1918-11-25 | Ireland | |
| Kilmarnock | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Scotland | |
| Kilmarnock Burghs | Parliamentary constituency in the United Kingdom, 1832-1918 | 1832-12-08 | 1918-11-25 | Scotland | |
| Kilmarnock and Loudoun | Parliamentary constituency in East Ayrshire, Scotland, UK, 1983 onwards | 1983-06-09 | East Ayrshire | ||
| Kincardine and Deeside | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Scotland | |
| Kincardine and Western Aberdeenshire | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | Aberdeenshire | |
| Kincardineshire | Parliamentary constituency in the United Kingdom, 1801-1918 | 1801 | 1918-11-25 | Scotland | |
| King's County | Parliamentary constituency in the United Kingdom, 1918-1922 | 1918-12-14 | 1922-10-26 | Ireland | |
| King's County | Parliamentary constituency in the United Kingdom, 1802-1885 | 1801-01-01 | 1885-11-18 | Ireland | |
| King's Lynn | Parliamentary constituency in the United Kingdom, 1885-1974 | 1885-11-24 | 1974-02-08 | Norfolk | |
| King's Lynn | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Kingston and Surbiton | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | Royal Borough of Kingston upon Thames | ||
| Kingston upon Hull | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Kingston upon Hull Central | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | ||
| Kingston upon Hull Central | Parliamentary constituency in the United Kingdom, 1885-1955 | 1885-11-24 | 1955-05-06 | ||
| Kingston upon Hull East | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | Yorkshire and the Humber | ||
| Kingston upon Hull North | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | Yorkshire and the Humber | |
| Kingston upon Hull North | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | ||
| Kingston upon Hull North West | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Kingston upon Hull North and Cottingham | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Yorkshire and the Humber | ||
| Kingston upon Hull South West | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Kingston upon Hull West | Parliamentary constituency in the United Kingdom, 1955-1997 | 1955-05-26 | 1997-04-08 | ||
| Kingston upon Hull West | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Kingston upon Hull West and Haltemprice | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Yorkshire and the Humber | ||
| Kingston upon Hull West and Hessle | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | Yorkshire and the Humber | |
| Kingston-upon-Thames | Parliamentary constituency in the United Kingdom, 1885-1997 | 1885-11-24 | 1997-04-08 | Surrey Greater London |
|
| Kingswinford | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Kingswinford and South Staffordshire | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | West Midlands | ||
| Kingswood | Parliamentary constituency in the United Kingdom, 1974-2024 | 1974-02-28 | 2024-05-30 | South West England | |
| Kinross and Western Perthshire | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Scotland | |
| Kinross-shire | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Scotland | |
| Kinsale | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Kirkcaldy | Parliamentary constituency in the United Kingdom, 1974-2005 | 1974-02-28 | 2005-04-11 | Scotland | |
| Kirkcaldy Burghs | Parliamentary constituency in the United Kingdom, 1832-1974 | 1832-12-08 | 1974-02-08 | Fife | |
| Kirkcaldy and Cowdenbeath | Parliamentary constituency in Fife, Scotland, UK, 2005-2024 | 2005-05-05 | 2024-05-30 | Fife | |
| Kirkcudbright Stewartry | Parliamentary constituency in the United Kingdom, 1801-1918 | 1801 | 1918-11-25 | Dumfries and Galloway | |
| Knaresborough | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | Knaresborough | |
| Knaresborough | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Knowsley | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | North West England | ||
| Knowsley North | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Merseyside | |
| Knowsley North and Sefton East | Parliamentary constituency in the United Kingdom, 1997-2010 | 1997-05-01 | 2010-04-12 | Merseyside | |
| Knowsley South | Parliamentary constituency in the United Kingdom, 1983-2010 | 1983-06-09 | 2010-04-12 | ||
| Knutsford | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | ||
| Lagan Valley | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | Northern Ireland | ||
| Lambeth | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | Greater London | |
| Lambeth Central | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | ||
| Lambeth North | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Lanark | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Scotland | |
| Lanark Burghs | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Scotland | |
| Lanark and Hamilton East | Parliamentary constituency in South Lanarkshire, Scotland, UK, 2005 onwards | 2005-05-05 | 2024-05-30 | South Lanarkshire | |
| Lanarkshire | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | Scotland | |
| Lanarkshire Northern | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | Scotland | |
| Lancashire | Parliamentary constituency in the United Kingdom, 1801–1832 | 1801 | 1832-12-03 | ||
| Lancaster | Parliamentary constituency in the United Kingdom, 1885-1997 | 1885-11-24 | 1997-04-08 | Lancashire | |
| Lancaster | Parliamentary constituency in the United Kingdom, 1801-1866 | 1801-01-01 | 1866 | ||
| Lancaster and Fleetwood | Parliamentary constituency in the United Kingdom, 2010-2024 | 2010-05-06 | 2024-05-30 | North West England | |
| Lancaster and Wyre | Parliamentary constituency in the United Kingdom, 1997-2010 | 1997-05-01 | 2010-04-12 | Lancashire | |
| Lancaster and Wyre | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Lancashire | ||
| Langbaurgh | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Cleveland | |
| Launceston | Parliamentary constituency in the United Kingdom, 1832-1918 | 1832-12-08 | 1918-11-25 | ||
| Launceston | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Leeds | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | Yorkshire | |
| Leeds | Parliamentary constituency in the United Kingdom, 1832-1868 | 1832-12-08 | 1868-11-11 | ||
| Leeds Central | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | Yorkshire and the Humber | |
| Leeds Central | Parliamentary constituency in the United Kingdom, 1885-1955 | 1885-11-24 | 1955-05-06 | ||
| Leeds Central and Headingley | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Yorkshire and the Humber | ||
| Leeds East | Parliamentary constituency in the United Kingdom, 1955 onwards | 1955-05-26 | Yorkshire and the Humber | ||
| Leeds East | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Leeds North | Parliamentary constituency in the United Kingdom, 1885-1955 | 1885-11-24 | 1955-05-06 | ||
| Leeds North East | Parliamentary constituency in the United Kingdom, 1918 onwards | 1918-12-14 | Yorkshire and the Humber | ||
| Leeds North West | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | Yorkshire and the Humber | ||
| Leeds South | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | ||
| Leeds South | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Yorkshire and the Humber | ||
| Leeds South East | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | ||
| Leeds South West and Morley | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Yorkshire and the Humber | ||
| Leeds West | Parliamentary constituency in the United Kingdom, 1885-2024 | 1885-11-24 | 2024-05-30 | Yorkshire and the Humber | |
| Leeds West and Pudsey | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Yorkshire and the Humber | ||
| Leek | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | Staffordshire | |
| Leicester | Parliamentary constituency in the United Kingdom, 1801–1918 | 1801 | 1918-11-25 | Leicestershire | |
| Leicester East | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | East Midlands | ||
| Leicester East | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Leicester North East | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | ||
| Leicester North West | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | ||
| Leicester South | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | East Midlands | ||
| Leicester South | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Leicester South East | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | ||
| Leicester South West | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | ||
| Leicester West | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | East Midlands | ||
| Leicester West | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Leicestershire | Parliamentary constituency in the United Kingdom, 1801–1832 | 1801 | 1832-12-03 | Leicestershire | |
| Leicestershire Southern | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| Leigh | Parliamentary constituency in the United Kingdom, 1885-2024 | 1885-11-24 | 2024-05-30 | North West England | |
| Leigh and Atherton | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | North West England | ||
| Leith | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | Scotland | |
| Leith Burghs | Parliamentary constituency in the United Kingdom, 1832-1918 | 1832-12-08 | 1918-11-25 | Scotland | |
| Leitrim | Parliamentary constituency in the United Kingdom, 1918-1922 | 1918-12-14 | 1922-10-26 | Ireland | |
| Leitrim | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Leix | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Ireland | |
| Leominster | Parliamentary constituency in the United Kingdom, 1868-2010 | 1868-11-17 | 2010-04-12 | Herefordshire | |
| Leominster | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | Herefordshire | |
| Lewes | Parliamentary constituency in the United Kingdom, 1868 onwards | 1868-11-17 | South East England | ||
| Lewes | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Lewisham | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Lewisham Deptford | Parliamentary constituency in the United Kingdom, 1974-2024 | 1974-02-28 | 2024-05-30 | London Borough of Lewisham | |
| Lewisham East | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | London Borough of Lewisham | ||
| Lewisham East | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Lewisham North | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | ||
| Lewisham North | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | London | ||
| Lewisham South | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | ||
| Lewisham West | Parliamentary constituency in the United Kingdom, 1918-2010 | 1918-12-14 | 2010-04-12 | London Borough of Lewisham | |
| Lewisham West and East Dulwich | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | London | ||
| Lewisham West and Penge | Parliamentary constituency in the United Kingdom, 2010-2024 | 2010-05-06 | 2024-05-30 | London Borough of Lewisham London Borough of Bromley |
|
| Leyton | Parliamentary constituency in the United Kingdom, 1950-1997 | 1950-02-23 | 1997-04-08 | Leyton | |
| Leyton East | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Leyton West | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Leyton and Wanstead | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | London Borough of Redbridge London Borough of Waltham Forest |
||
| Lichfield | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | West Midlands | ||
| Lichfield | Parliamentary constituency in the United Kingdom, 1868-1950 | 1868-11-17 | 1950-02-03 | ||
| Lichfield | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Lichfield and Tamworth | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | Staffordshire | |
| Limehouse | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Limerick City | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| Limerick City | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Ireland | |
| Limerick City | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | Ireland | |
| Lincoln | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | East Midlands | ||
| Lincoln | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Lincolnshire | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Lincolnshire | |
| Linlithgow | Parliamentary constituency in the United Kingdom, 1983-2005 | 1983-06-09 | 2005-04-11 | Scotland | |
| Linlithgow and East Falkirk | Parliamentary constituency in the United Kingdom, 2005-2024 | 2005-05-05 | 2024-05-30 | Falkirk West Lothian |
|
| Linlithgowshire | Parliamentary constituency in the United Kingdom, 1801-1950 | 1801 | 1950-02-03 | Scotland | |
| Lisburn | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Liskeard | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| Liskeard | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Littleborough and Saddleworth | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Greater Manchester | |
| Liverpool | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | Lancashire | |
| Liverpool | Parliamentary constituency in the United Kingdom (1801-1868) | 1801-01-01 | 1868-11-11 | ||
| Liverpool Abercromby | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Liverpool Broadgreen | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Liverpool | |
| Liverpool East Toxteth | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Liverpool Edge Hill | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Liverpool | |
| Liverpool Everton | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Liverpool Exchange | Parliamentary constituency in the United Kingdom, 1885-1974 | 1885-11-24 | 1974-02-08 | ||
| Liverpool Fairfield | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Liverpool Garston | Parliamentary constituency in the United Kingdom, 1950-2010 | 1950-02-23 | 2010-04-12 | Liverpool | |
| Liverpool Garston | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Liverpool | ||
| Liverpool Kirkdale | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | ||
| Liverpool Mossley Hill | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Liverpool | |
| Liverpool Riverside | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | North West England | ||
| Liverpool Scotland | Parliamentary constituency in the United Kingdom, 1885-1974 | 1885-11-24 | 1974-02-08 | ||
| Liverpool Scotland Exchange | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | ||
| Liverpool Toxteth | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | ||
| Liverpool Walton | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | North West England | ||
| Liverpool Wavertree | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | North West England | ||
| Liverpool Wavertree | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Liverpool | |
| Liverpool West Derby | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | North West England | ||
| Liverpool West Toxteth | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Livingston | Parliamentary constituency in West Lothian, Scotland, UK, 1983 onwards | 1983-06-09 | West Lothian | ||
| Llandaff and Barry | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | Wales | |
| Llanelli | Parliamentary constituency in the United Kingdom, 1918 onwards | 1918-12-14 | Carmarthenshire | ||
| London University | Parliamentary constituency in the United Kingdom, 1868-1950 | 1868-11-17 | 1950-02-03 | ||
| Londonderry City | Parliamentary constituency in the United Kingdom, 1801-1922 | 1801-01-01 | 1922-10-26 | Ireland | |
| Londonderry County | Parliamentary constituency in the United Kingdom, 1922-1983 | 1922-11-15 | 1983-05-13 | Northern Ireland | |
| Londonderry County | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Longford | Parliamentary constituency in the United Kingdom, 1918-1922 | 1918-12-14 | 1922-10-26 | Ireland | |
| Longford | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Lonsdale | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Lostwithiel | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Lostwithiel | |
| Lothian East | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | East Lothian | ||
| Loughborough | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | East Midlands | ||
| Louth and Horncastle | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | East Midlands | ||
| Louth, Lincolnshire | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | Lincolnshire | |
| Lowestoft | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | ||
| Lowestoft | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | East of England | ||
| Ludgershall | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Wiltshire | |
| Ludlow | Parliamentary constituency in the United Kingdom, 1868-2024 | 1868-11-17 | 2024-05-30 | West Midlands | |
| Ludlow | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Luton | Parliamentary constituency in the United Kingdom, 1885-1974 | 1885-11-24 | 1974-02-08 | ||
| Luton East | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | Luton | |
| Luton North | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | East of England | ||
| Luton South | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | East of England | |
| Luton South and South Bedfordshire | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | East of England | ||
| Luton West | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | ||
| Lyme Regis | Parliamentary constituency in the United Kingdom, 1832-1868 | 1832-12-08 | 1868-11-11 | Dorset | |
| Lyme Regis | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Lymington | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | ||
| Lymington | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Macclesfield | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | North West England | ||
| Macclesfield | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| Maidenhead | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | South East England | ||
| Maidstone | Parliamentary constituency in the United Kingdom, 1885-1997 | 1885-11-24 | 1997-04-08 | Maidstone | |
| Maidstone | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Maidstone and Malling | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South East England | ||
| Maidstone and The Weald | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | South East England | |
| Makerfield | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | North West England | ||
| Maldon | Parliamentary constituency in the United Kingdom from 1332 to 1983 and 2010 onwards | 2010-05-06 | East of England Essex |
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| Maldon | Parliamentary constituency in the United Kingdom, 1868-1983 | 1868-11-17 | 1983-05-13 | Essex | |
| Maldon | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Maldon and East Chelmsford | Parliamentary constituency in the United Kingdom, 1997-2010 | 1997-05-01 | 2010-04-12 | Essex | |
| Mallow | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Malmesbury | parliamentary constituency in the United Kingdom, 1832–1885 | 1832-12-08 | 1885-11-18 | Wiltshire | |
| Malmesbury | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801-01-01 | 1832-12-03 | Wiltshire | |
| Malton | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | ||
| Malton | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Manchester | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | ||
| Manchester | Parliamentary constituency in the United Kingdom (1832-1868) | 1832-12-10 | 1868-11-11 | ||
| Manchester Ardwick | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | ||
| Manchester Blackley | Parliamentary constituency in the United Kingdom, 1918-2010 | 1918-12-14 | 2010-04-12 | Manchester | |
| Manchester Central | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | North West England | ||
| Manchester Cheetham | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | ||
| Manchester Clayton | Parliamentary constituency in the United Kingdom, 1918-1955 | 1918-12-14 | 1955-05-06 | ||
| Manchester East | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Manchester Exchange | Parliamentary constituency in the United Kingdom, 1918-1974 | 1918-12-14 | 1974-02-08 | ||
| Manchester Gorton | Parliamentary constituency in the United Kingdom, 1885-2024 | 1885-11-24 | 2024-05-30 | North West England | |
| Manchester Hulme | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Manchester Moss Side | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Manchester | |
| Manchester North | Parliamentary constituency in the United Kingdom, 1885–1918 | 1885-11-24 | 1918-11-25 | Manchester | |
| Manchester North East | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Manchester North West | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Manchester Openshaw | Parliamentary constituency in the United Kingdom, 1955-1983 | 1955-05-26 | 1983-05-13 | Manchester | |
| Manchester Platting | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Manchester Rusholme | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Manchester Rusholme | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | North West England | ||
| Manchester South | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Manchester South West | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Manchester Withington | Parliamentary constituency in the United Kingdom, 1918 onwards | 1918-12-14 | North West England | ||
| Manchester Wythenshawe | Parliamentary constituency in the United Kingdom, 1950-1997 | 1950-02-23 | 1997-04-08 | ||
| Mansfield | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | East Midlands | ||
| Marlborough | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | ||
| Marlborough | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Marylebone | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| Marylebone East | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Marylebone West | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Mayo | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Meath | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Medway | Parliamentary constituency in the United Kingdom, 1983-2010 | 1983-06-09 | 2010-04-12 | Medway | |
| Medway | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Meirionnydd Nant Conwy | Parliamentary constituency in the United Kingdom, 1983-2010 | 1983-06-09 | 2010-04-12 | Wales | |
| Melksham and Devizes | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South West England | ||
| Melton | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | ||
| Melton and Syston | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | East Midlands | ||
| Meon Valley | Parliamentary constituency in the United Kingdom, 2010-2024 | 2010-05-06 | 2024-05-30 | South East England | |
| Meriden | Parliamentary constituency in the United Kingdom, 1955-2024 | 1955-05-26 | 2024-05-30 | West Midlands | |
| Meriden and Solihull East | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | West Midlands | ||
| Merioneth | Parliamentary constituency in the United Kingdom, 1801-1983 | 1801 | 1983-05-13 | Merionethshire Wales |
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| Merthyr | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | Wales | |
| Merthyr Tydfil | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | Glamorgan Wales |
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| Merthyr Tydfil | Parliamentary constituency in the United Kingdom, 1868-1918 | 1868-11-17 | 1918-11-25 | Wales | |
| Merthyr Tydfil | Parliamentary constituency in the United Kingdom, 1832-1868 | 1832-12-08 | 1868-11-11 | Wales | |
| Merthyr Tydfil and Aberdare | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Wales | ||
| Merthyr Tydfil and Rhymney | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | Merthyr Tydfil County Borough | |
| Merton and Morden | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | Greater London | |
| Mid Antrim | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| Mid Armagh | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| Mid Bedfordshire | Parliamentary constituency in the United Kingdom, 1918 onwards | 1918-12-14 | East of England | ||
| Mid Buckinghamshire | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South East England | ||
| Mid Cheshire | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | ||
| Mid Cheshire | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | North West England | ||
| Mid Cork | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| Mid Derbyshire | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | East Midlands | ||
| Mid Dorset and North Poole | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | South West England | ||
| Mid Down | Parliamentary constituency in the United Kingdom, 1918-1922 | 1918-12-14 | 1922-10-26 | Ireland | |
| Mid Dunbartonshire | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Scotland | ||
| Mid Durham | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | County Durham | |
| Mid Glamorganshire | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Wales | |
| Mid Kent | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | ||
| Mid Kent | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | ||
| Mid Lanarkshire | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Scotland | |
| Mid Leicestershire | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | East Midlands | ||
| Mid Lincolnshire | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | ||
| Mid Norfolk | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | East of England | ||
| Mid Northamptonshire | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Mid Oxfordshire | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | Oxfordshire | |
| Mid Somerset | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | ||
| Mid Staffordshire | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Staffordshire | |
| Mid Surrey | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | ||
| Mid Sussex | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | South East England | ||
| Mid Tipperary | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| Mid Tyrone | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Ireland | |
| Mid Ulster | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | Northern Ireland | ||
| Mid Worcestershire | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | West Midlands | |
| Mid and South Pembrokeshire | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Wales | ||
| Middlesbrough | Parliamentary constituency in the United Kingdom, 1974-2024 | 1974-02-28 | 2024-05-30 | North East England | |
| Middlesbrough | Parliamentary constituency in the United Kingdom, 1868-1918 | 1868-11-17 | 1918-11-25 | ||
| Middlesbrough East | Parliamentary constituency in the United Kingdom, 1918-1974 | 1918-12-14 | 1974-02-08 | ||
| Middlesbrough South and East Cleveland | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | North East England | ||
| Middlesbrough West | Parliamentary constituency in the United Kingdom, 1918-1974 | 1918-12-14 | 1974-02-08 | Middlesbrough | |
| Middlesbrough and Thornaby East | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | North East England | ||
| Middlesex | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Middlesex | |
| Middleton | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Middleton and Prestwich | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Greater Manchester | |
| Midhurst | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | Sussex | |
| Midhurst | Parliamentary constituency in the United Kingdom, 1707-1832 | 1707 | 1832-12-03 | ||
| Midlothian | Parliamentary constituency in Midlothian, Scotland, UK, 1955 onwards | 1955-05-26 | Midlothian | ||
| Midlothian | Parliamentary constituency in the United Kingdom, 1801-1918 | 1801 | 1918-11-25 | Midlothian | |
| Midlothian and Peebles | Parliamentary constituency in the United Kingdom, 1950-1955 | 1950-02-23 | 1955-05-06 | Scotland | |
| Midlothian and Peebles Northern | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | Scotland | |
| Milborne Port | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Mile End | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Milton Keynes | Parliamentary constituency in the United Kingdom, 1983-1992 | 1983-06-09 | 1992-03-16 | ||
| Milton Keynes Central | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South East England | ||
| Milton Keynes North | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | South East England | ||
| Milton Keynes South | Parliamentary constituency in the United Kingdom, 2010-2024 | 2010-05-06 | 2024-05-30 | South East England | |
| Milton Keynes South West | Parliamentary constituency in the United Kingdom, 1992-2010 | 1992-04-09 | 2010-04-12 | City of Milton Keynes | |
| Minehead | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Somerset | |
| Mitcham | Parliamentary constituency in the United Kingdom, 1918-1974 | 1918-12-14 | 1974-02-08 | ||
| Mitcham and Morden | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | London Borough of Merton | ||
| Mitchell | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Mole Valley | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | South East England | |
| Monaghan | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Monklands East | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Scotland | |
| Monklands West | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Scotland | |
| Monmouth | Parliamentary constituency in the United Kingdom, 1918-2024 | 1918-12-14 | 2024-05-30 | Monmouthshire | |
| Monmouth Boroughs | Parliamentary constituency in the United Kingdom, 1801-1918 | 1801 | 1918-11-25 | Monmouthshire Wales |
|
| Monmouthshire | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Wales | |
| Monmouthshire | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Wales | ||
| Montgomery | Parliamentary constituency in the United Kingdom, 1801-1918 | 1801 | 1918-11-25 | Montgomeryshire Wales |
|
| Montgomeryshire | Parliamentary constituency in the United Kingdom, 1801-2024 | 1801 | 2024-05-30 | Powys | |
| Montgomeryshire and Glyndŵr | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Wales | ||
| Montrose Burghs | Parliamentary constituency in the United Kingdom, 1832-1950 | 1832-12-08 | 1950-02-03 | Scotland | |
| Moray | Parliamentary constituency in Moray, Scotland, UK, 1983 onwards | 1983-06-09 | 2024-05-30 | Moray | |
| Moray West, Nairn and Strathspey | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Scotland | ||
| Moray and Nairn | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Scotland | |
| Morecambe and Lonsdale | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | Cumbria | |
| Morecambe and Lunesdale | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | North West England | ||
| Morley | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Morley and Leeds South | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | ||
| Morley and Outwood | Parliamentary constituency in the United Kingdom, 2010-2024 | 2010-05-06 | 2024-05-30 | Yorkshire and the Humber | |
| Morley and Rothwell | Parliamentary constituency in the United Kingdom, 1997-2010 | 1997-05-01 | 2010-04-12 | West Yorkshire | |
| Morpeth | Parliamentary constituency in the United Kingdom, 1832-1983 | 1832-12-08 | 1983-05-13 | Northumberland | |
| Morpeth | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Mossley | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Motherwell | Parliamentary constituency in the United Kingdom, 1918-1974 | 1918-12-14 | 1974-02-08 | North Lanarkshire | |
| Motherwell North | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Scotland | |
| Motherwell South | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Scotland | |
| Motherwell and Wishaw | Parliamentary constituency in North Lanarkshire, Scotland, UK, 1997 onwards | 1997-05-01 | 2024-05-30 | North Lanarkshire | |
| Motherwell and Wishaw | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | Scotland | |
| Motherwell, Wishaw and Carluke | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Scotland | ||
| Na h-Eileanan an Iar | Parliamentary constituency in Outer Hebrides, Scotland, UK, 1918 onwards | 1918-12-14 | Outer Hebrides | ||
| Nairnshire | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Scotland | |
| Nantwich | Parliamentary constituency in the United Kingdom, 1955-1983 | 1955-05-26 | 1983-05-13 | Nantwich | |
| National University of Ireland | Parliamentary constituency in the United Kingdom, 1918-1922 | 1918-12-14 | 1922-10-26 | Ireland | |
| Neath | Parliamentary constituency in the United Kingdom, 1918-2024 | 1918-12-14 | 2024-05-30 | Neath Port Talbot | |
| Neath and Swansea East | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Wales | ||
| Nelson and Colne | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Lancashire | |
| New Forest | Parliamentary constituency in the United Kingdom, 1950-1997 | 1950-02-23 | 1997-04-08 | Hampshire | |
| New Forest | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| New Forest East | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | South East England | ||
| New Forest West | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | South East England | ||
| New Forest and Christchurch | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| New Romney | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| New Ross | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| New Shoreham | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Newark | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | East Midlands | ||
| Newark | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Newbury | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | South East England | ||
| Newcastle upon Tyne Central | Parliamentary constituency in the United Kingdom, 1918-2024 | 1918-12-14 | 2024-05-30 | Newcastle upon Tyne | |
| Newcastle upon Tyne Central and West | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | North East England | ||
| Newcastle upon Tyne East | Parliamentary constituency in the United Kingdom, 2010-2024 | 2010-05-06 | 2024-05-30 | North East England | |
| Newcastle upon Tyne East | Parliamentary constituency in the United Kingdom, 1918-1997 | 1918-12-14 | 1997-04-08 | Newcastle upon Tyne | |
| Newcastle upon Tyne East and Wallsend | Parliamentary constituency in the United Kingdom, 1997-2010 | 1997-05-01 | 2010-04-12 | North East England | |
| Newcastle upon Tyne East and Wallsend | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | North East England | ||
| Newcastle upon Tyne North | Parliamentary constituency in the United Kingdom, 1918 onwards | 1918-12-14 | North East England | ||
| Newcastle upon Tyne West | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Newcastle upon Tyne | |
| Newcastle-under-Lyme | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | West Midlands | ||
| Newcastle-under-Lyme | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Newcastle-upon-Tyne | Parliamentary constituency in the United Kingdom, 1801-1918 | 1801 | 1918-11-25 | Northumberland | |
| Newham North East | Parliamentary constituency in the United Kingdom, 1974-1997 | 1974-02-28 | 1997-04-08 | London | |
| Newham North West | Parliamentary constituency in the United Kingdom, 1974-1997 | 1974-02-28 | 1997-04-08 | ||
| Newham South | Parliamentary constituency in the United Kingdom, 1974-1997 | 1974-02-28 | 1997-04-08 | London | |
| Newington Walworth | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Newington West | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Newmarket | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Newport | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Cornwall | |
| Newport | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Newport | |
| Newport (Isle of Wight) | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | ||
| Newport (Isle of Wight) | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Newport (Shropshire) | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Newport East | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | Newport Monmouthshire |
||
| Newport West | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | Newport | |
| Newport West and Islwyn | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Wales | ||
| Newry | Parliamentary constituency in the United Kingdom, 1801-1918 | 1801 | 1918-11-25 | Ireland | |
| Newry and Armagh | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | Northern Ireland | ||
| Newton | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | Lancashire | |
| Newton | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Newton Abbot | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | South West England | ||
| Newton Aycliffe and Spennymoor | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | North East England | ||
| Newtown | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Newtown | |
| Norfolk | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Norfolk Eastern | Parliamentary constituency in the United Kingdom, 1832-1868 | 1832-12-08 | 1868-11-11 | ||
| Norfolk Mid | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Norfolk North Western | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Normanton | Parliamentary constituency in the United Kingdom, 1885-2010 | 1885-11-24 | 2010-04-12 | Normanton | |
| Normanton and Hemsworth | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Yorkshire and the Humber | ||
| Normanton, Pontefract and Castleford | Parliamentary constituency in the United Kingdom, 2010-2024 | 2010-05-06 | 2024-05-30 | Yorkshire and the Humber | |
| North Angus and Mearns | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | Scotland | |
| North Antrim | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | Northern Ireland | ||
| North Armagh | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| North Ayrshire | Parliamentary constituency in the United Kingdom, 1868-1918 | 1868-11-17 | 1918-11-25 | Scotland | |
| North Ayrshire and Arran | Parliamentary constituency in North Ayrshire, Scotland, UK, 2005 onwards | 2005-05-05 | North Ayrshire | ||
| North Bedfordshire | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | ||
| North Bedfordshire | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | East of England | ||
| North Cheshire | Parliamentary constituency in the United Kingdom, 1832-1868 | 1832-12-08 | 1868-11-11 | ||
| North Cork | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| North Cornwall | Parliamentary constituency in the United Kingdom, 1918 onwards | 1918-12-14 | South West England | ||
| North Cotswolds | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South West England | ||
| North County Dublin | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| North Cumberland | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| North Derbyshire | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| North Donegal | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| North Dorset | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | South West England | ||
| North Down | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | Northern Ireland | ||
| North Durham | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | North East England | ||
| North East Bedfordshire | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | East of England | |
| North East Cambridgeshire | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | East of England | ||
| North East Cork | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| North East Derbyshire | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | East Midlands | ||
| North East Fife | Parliamentary constituency in Fife, Scotland, UK, 1983 onwards | 1983-06-09 | Fife | ||
| North East Hampshire | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | South East England | ||
| North East Hertfordshire | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | East of England | ||
| North East Lanarkshire | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Scotland | |
| North East Lancashire | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | ||
| North East Milton Keynes | Parliamentary constituency in the United Kingdom, 1992-2010 | 1992-04-09 | 2010-04-12 | Milton Keynes | |
| North East Somerset | Parliamentary constituency in the United Kingdom, 2010-2024 | 2010-05-06 | 2024-05-30 | South West England | |
| North East Somerset and Hanham | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South West England | ||
| North East Tyrone | Parliamentary constituency in the United Kingdom, 1918-1922 | 1918-12-14 | 1922-10-26 | Ireland | |
| North Essex | Parliamentary constituency in the United Kingdom, 1997-2010 | 1997-05-01 | 2010-04-12 | Essex | |
| North Fermanagh | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| North Galway | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| North Hampshire | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| North Herefordshire | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | West Midlands | ||
| North Hertfordshire | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Hertfordshire | |
| North Kerry | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| North Kildare | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| North Kilkenny | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| North Lanarkshire | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Scotland | |
| North Lancashire | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| North Leicestershire | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| North Leitrim | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Ireland | |
| North Lincolnshire | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| North Londonderry | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| North Longford | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Ireland | |
| North Lonsdale | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| North Louth | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Ireland | |
| North Mayo | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| North Meath | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| North Monaghan | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| North Monmouthshire | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Wales | |
| North Norfolk | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | East of England | ||
| North Norfolk | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | ||
| North Northamptonshire | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| North Northamptonshire | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| North Northumberland | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| North Northumberland | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | North East England | ||
| North Nottinghamshire | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| North Riding of Yorkshire | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| North Roscommon | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| North Shropshire | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | West Midlands | ||
| North Sligo | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| North Somerset | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | South West England | ||
| North Southwark and Bermondsey | Parliamentary constituency in the United Kingdom, 1997–2010 | 1997-05-01 | 2010-04-12 | London Borough of Southwark | |
| North Staffordshire | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| North Swindon | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | South West England | |
| North Tayside | Parliamentary constituency in the United Kingdom, 1983-2005 | 1983-06-09 | 2005-04-11 | Scotland | |
| North Thanet | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | South East England | |
| North Tipperary | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| North Tyneside | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | North East England | |
| North Tyrone | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Ireland | |
| North Warwickshire | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | West Midlands | |
| North Warwickshire and Bedworth | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | West Midlands | ||
| North West Cambridgeshire | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | East of England | ||
| North West Durham | Parliamentary constituency in the United Kingdom, 1950-2024 | 1950-02-23 | 2024-05-30 | North East England | |
| North West Essex | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | East of England | ||
| North West Hampshire | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | South East England | ||
| North West Lanarkshire | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | South Lanarkshire | |
| North West Leicestershire | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | East Midlands | ||
| North West Norfolk | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | East of England | ||
| North West Staffordshire | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| North West Surrey | Parliamentary constituency in the United Kingdom, 1974-1997 | 1974-02-28 | 1997-04-08 | ||
| North West Tyrone | Parliamentary constituency in the United Kingdom, 1918-1922 | 1918-12-14 | 1922-10-26 | Ireland | |
| North Westmeath | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Ireland | |
| North Wexford | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| North Wiltshire | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | South West England | |
| North Worcestershire | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Northallerton | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| Northallerton | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Northampton | Parliamentary constituency in the United Kingdom, 1918-1974 | 1918-12-14 | 1974-02-08 | Northampton | |
| Northampton | Parliamentary constituency in the United Kingdom, 1801-1918 | 1801 | 1918-11-25 | ||
| Northampton North | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | East Midlands | ||
| Northampton South | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | East Midlands | ||
| Northamptonshire | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Northamptonshire | |
| Northamptonshire South | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | ||
| Northamptonshire Southern | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Northamptonshire Southern | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| Northavon | Parliamentary constituency in the United Kingdom, 1983-2010 | 1983-06-09 | 2010-04-12 | South Gloucestershire | |
| Northern West Riding of Yorkshire | Parliamentary constituency in the United Kingdom, 1865-1885 | 1865-07-11 | 1885-11-18 | ||
| Northumberland | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Northwich | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | Cheshire | |
| Norwich | Parliamentary constituency in the United Kingdom, 1801-1950 | 1801 | 1950-02-03 | ||
| Norwich North | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | East of England | ||
| Norwich South | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | East of England | ||
| Norwood | Parliamentary constituency in the United Kingdom, 1885-1997 | 1885-11-24 | 1997-04-08 | ||
| Nose | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | South West England | ||
| Nottingham | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Nottinghamshire | |
| Nottingham Central | Parliamentary constituency in the United Kingdom, 1918-1974 | 1918-12-14 | 1974-02-08 | ||
| Nottingham East | parliamentary constituency in the United Kingdom, 1885–1955 and 1974 onwards | 1974-02-28 | East Midlands | ||
| Nottingham East | Parliamentary constituency in the United Kingdom, 1885-1955 | 1885-11-24 | 1955-05-06 | ||
| Nottingham North | Parliamentary constituency in the United Kingdom, 1955-2024 | 1955-05-26 | 2024-05-30 | East Midlands | |
| Nottingham North West | Parliamentary constituency in the United Kingdom, 1950-1955 | 1950-02-23 | 1955-05-06 | ||
| Nottingham North and Kimberley | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | East Midlands | ||
| Nottingham South | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | East Midlands | ||
| Nottingham South | Parliamentary constituency in the United Kingdom, 1885-1974 | 1885-11-24 | 1974-02-08 | Nottingham | |
| Nottingham West | Parliamentary constituency in the United Kingdom, 1955-1983 | 1955-05-26 | 1983-05-13 | ||
| Nottingham West | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Nottinghamshire | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Nuneaton | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | West Midlands | ||
| Ochil | Parliamentary constituency in the United Kingdom, 1997–2005 | 1997-05-01 | 2005-04-11 | Scotland | |
| Ochil and South Perthshire | Parliamentary constituency in the United Kingdom, 2005-2024 | 2005-05-05 | 2024-05-30 | Clackmannanshire Perth and Kinross |
|
| Ogmore | Parliamentary constituency in the United Kingdom, 1918-2024 | 1918-12-14 | 2024-05-30 | Bridgend County Borough Rhondda Cynon Taf |
|
| Okehampton | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Devon | |
| Old Bexley and Sidcup | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | London Borough of Bexley | ||
| Old Sarum | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Oldbury and Halesowen | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | ||
| Oldham | Parliamentary constituency in the United Kingdom, 1832-1950 | 1832-12-08 | 1950-02-03 | ||
| Oldham Central and Royton | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Greater Manchester | |
| Oldham East | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | ||
| Oldham East and Saddleworth | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | North West England | ||
| Oldham West | Parliamentary constituency in the United Kingdom, 1950-1997 | 1950-02-23 | 1997-04-08 | ||
| Oldham West and Royton | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | North West England | |
| Oldham West, Chadderton and Royton | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | North West England | ||
| Orford | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Suffolk | |
| Orkney and Shetland | Parliamentary constituency in the United Kingdom, 1801 onwards | 1801 | Shetland Islands Orkney Islands |
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| Ormskirk | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | Lancashire | |
| Orpington | Parliamentary constituency in the United Kingdom, 1945 onwards | 1945-07-05 | London Borough of Bromley | ||
| Osgoldcross | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Ossett and Denby Dale | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Yorkshire and the Humber | ||
| Ossory | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Ireland | |
| Oswestry | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | ||
| Otley | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Oxford | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | Oxfordshire | |
| Oxford | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Oxford East | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | South East England | ||
| Oxford University | Parliamentary constituency in the United Kingdom, 1801-1950 | 1801 | 1950-02-03 | ||
| Oxford West and Abingdon | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | South East England | ||
| Oxfordshire | Parliamentary constituency in the United Kingdom, 1832–1885 | 1832-12-08 | 1885-11-18 | ||
| Oxfordshire | Parliamentary constituency in the United Kingdom (1801-1832) | 1801 | 1832 | ||
| Paddington | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | Greater London | |
| Paddington North | Parliamentary constituency in the United Kingdom, 1885-1974 | 1885-11-24 | 1974-02-08 | ||
| Paddington South | Parliamentary constituency in the United Kingdom, 1885-1974 | 1885-11-24 | 1974-02-08 | ||
| Paisley | Parliamentary constituency in the United Kingdom, 1832-1983 | 1832-12-08 | 1983-05-13 | Scotland | |
| Paisley North | Parliamentary constituency in the United Kingdom, 1983-2005 | 1983-06-09 | 2005-04-11 | Scotland | |
| Paisley South | Parliamentary constituency in the United Kingdom, 1983-2005 | 1983-06-09 | 2005-04-11 | Scotland | |
| Paisley and Renfrewshire North | Parliamentary constituency in Renfrewshire, Scotland, UK, 2005 onwards | 2005-05-05 | Renfrewshire | ||
| Paisley and Renfrewshire South | Parliamentary constituency in Renfrewshire, Scotland, UK, 2005 onwards | 2005-05-05 | Renfrewshire | ||
| Partick | UK Parliament constituency (1885–1918) | 1885-11-24 | 1918-11-25 | Scotland | |
| Peckham | Parliamentary constituency in the United Kingdom, 1885-1997 | 1885-11-24 | 1997-04-08 | ||
| Peckham | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | London | ||
| Peebles and Selkirk | Parliamentary constituency in the United Kingdom, 1868-1918 | 1868-11-17 | 1918-11-25 | Scotland | |
| Peebles and Southern Midlothian | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | Scotland | |
| Peeblesshire | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | Scotland | |
| Pembroke | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Pembrokeshire Wales |
|
| Pembroke and Haverfordwest | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Wales | |
| Pembrokeshire | Parliamentary constituency in the United Kingdom, 1801-1997 | 1801 | 1997-04-08 | Dyfed Wales |
|
| Pendle | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | Lancashire | |
| Pendle and Clitheroe | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | North West England | ||
| Penistone | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | ||
| Penistone and Stocksbridge | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | Yorkshire and the Humber | ||
| Penrith | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Penrith and Cockermouth | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Penrith and Solway | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | North West England | ||
| Penrith and The Border | Parliamentary constituency in the United Kingdom, 1950-2024 | 1950-02-23 | 2024-05-30 | North West England | |
| Penryn | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Penryn and Falmouth | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Penryn and Falmouth | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| Perth | Parliamentary constituency in the United Kingdom, 1997-2005 | 1997-05-01 | 2005-04-11 | Scotland | |
| Perth | Parliamentary constituency in the United Kingdom, 1832-1950 | 1832-12-08 | 1950-02-03 | Scotland | |
| Perth Burghs | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Scotland | |
| Perth and East Perthshire | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | Scotland | |
| Perth and Kinross | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Scotland | |
| Perth and Kinross-shire | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Scotland | ||
| Perth and North Perthshire | Parliamentary constituency in Perth and Kinross, Scotland, UK, 2005 onwards | 2005-05-05 | 2024-05-30 | Perth and Kinross | |
| Perthshire | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Perthshire | |
| Peterborough | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | East of England | ||
| Peterborough | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Petersfield | Parliamentary constituency in the United Kingdom, 1832-1983 | 1832-12-08 | 1983-05-13 | Petersfield | |
| Petersfield | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Plaistow | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Plymouth | Parliamentary constituency in the United Kingdom, 1801-1918 | 1801 | 1918-11-25 | Devon | |
| Plymouth Devonport | Parliamentary constituency in the United Kingdom, 1918-2010 | 1918-12-14 | 2010-04-12 | Plymouth | |
| Plymouth Devonport | Parliamentary constituency in the United Kingdom, 1832-1918 | 1832-12-08 | 1918-11-25 | ||
| Plymouth Drake | Parliamentary constituency in the United Kingdom, 1974-1997 | 1974-02-28 | 1997-04-08 | Plymouth | |
| Plymouth Drake | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Plymouth Moor View | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | South West England | ||
| Plymouth Sutton | Parliamentary constituency in the United Kingdom, 1918-2010 | 1918-12-14 | 2010-04-12 | Plymouth | |
| Plymouth Sutton and Devonport | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | South West England | ||
| Plympton Erle | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Devon | |
| Pontefract | Parliamentary constituency in the United Kingdom, 1885-1974 | 1885-11-24 | 1974-02-08 | Yorkshire | |
| Pontefract | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Pontefract and Castleford | Parliamentary constituency in the United Kingdom, 1974-2010 | 1974-02-28 | 2010-04-12 | ||
| Pontefract, Castleford and Knottingley | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Yorkshire and the Humber | ||
| Pontypool | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Wales | |
| Pontypridd | Parliamentary constituency in the United Kingdom, 1918 onwards | 1918-12-14 | Rhondda Cynon Taf | ||
| Poole | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | South West England | ||
| Poole | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | ||
| Poole | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Poplar | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | ||
| Poplar | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Poplar South | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Poplar and Canning Town | Parliamentary constituency in the United Kingdom, 1997-2010 | 1997-05-01 | 2010-04-12 | Greater London | |
| Poplar and Limehouse | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | London Borough of Tower Hamlets | ||
| Portarlington | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Portsmouth | Parliamentary constituency in the United Kingdom, 1801-1918 | 1801 | 1918-11-25 | ||
| Portsmouth Central | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Portsmouth Langstone | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | ||
| Portsmouth North | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | South East England | ||
| Portsmouth North | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Portsmouth South | Parliamentary constituency in the United Kingdom, 1918 onwards | 1918-12-14 | South East England | ||
| Portsmouth West | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | Portsmouth | |
| Preseli Pembrokeshire | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | Pembrokeshire | |
| Preston | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | North West England | ||
| Preston | Parliamentary constituency in the United Kingdom, 1801-1950 | 1801 | 1950-02-03 | ||
| Preston North | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | Preston | |
| Preston South | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | ||
| Prestwich | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Pudsey | Parliamentary constituency in the United Kingdom, 1950-2024 | 1950-02-23 | 2024-05-30 | Yorkshire and the Humber | |
| Pudsey | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Pudsey and Otley | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Putney | Parliamentary constituency in the United Kingdom, 1918 onwards | 1918-12-14 | London Borough of Wandsworth | ||
| Queen's County | Parliamentary constituency in the United Kingdom, 1918-1922 | 1918-12-14 | 1922-10-26 | Ireland | |
| Queen's County | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Queen's Park and Maida Vale | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | London | ||
| Queen's University of Belfast | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | Northern Ireland | |
| Queenborough | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Kent | |
| Radcliffe-cum-Farnworth | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Radnor Boroughs | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Wales | |
| Radnorshire | Parliamentary constituency in the United Kingdom, 1801-1918 | 1801 | 1918-11-25 | Radnorshire Wales |
|
| Ramsey | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Ravensbourne | Parliamentary constituency in the United Kingdom, 1974-1997 | 1974-02-28 | 1997-04-08 | ||
| Rawmarsh and Conisbrough | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Yorkshire and the Humber | ||
| Rayleigh | Parliamentary constituency in the United Kingdom, 1997-2010 | 1997-05-01 | 2010-04-12 | Rayleigh | |
| Rayleigh and Wickford | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | East of England | ||
| Reading | Parliamentary constituency in the United Kingdom, 1955-1974 | 1955-05-26 | 1974-02-08 | Reading | |
| Reading | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | Reading | |
| Reading | Parliamentary constituency in the United Kingdom (1801-1885) | 1801 | 1885-11-18 | Reading | |
| Reading Central | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South East England | ||
| Reading East | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | South East England | |
| Reading North | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | ||
| Reading North | Parliamentary constituency in the United Kingdom, 1950-1955 | 1950-02-23 | 1955-05-06 | ||
| Reading South | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | ||
| Reading South | Parliamentary constituency in the United Kingdom, 1950-1955 | 1950-02-23 | 1955-05-06 | ||
| Reading West | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | South East England | |
| Reading West and Mid Berkshire | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South East England | ||
| Redcar | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | North East England | ||
| Redditch | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | West Midlands | ||
| Regent's Park and Kensington North | Parliamentary constituency in the United Kingdom, 1997-2010 | 1997-05-01 | 2010-04-12 | Greater London | |
| Reigate | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | South East England | ||
| Reigate | Parliamentary constituency in the United Kingdom, 1832-1868 | 1832 | 1868 | ||
| Reigate | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Renfrew West and Inverclyde | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Scotland | |
| Renfrewshire | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Scotland | |
| Renfrewshire East | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | Scotland | |
| Renfrewshire West | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | Scotland | |
| Rhondda | Parliamentary constituency in the United Kingdom, 1974-2024 | 1974-02-28 | 2024-05-30 | Rhondda Cynon Taf | |
| Rhondda | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Wales | |
| Rhondda East | Parliamentary constituency in the United Kingdom, 1918-1974 | 1918-12-14 | 1974-02-08 | Wales | |
| Rhondda West | Parliamentary constituency in the United Kingdom, 1918-1974 | 1918-12-14 | 1974-02-08 | Wales | |
| Rhondda and Ogmore | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Wales | ||
| Ribble Valley | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | North West England | ||
| Richmond (Surrey) | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | ||
| Richmond (Yorks) | Parliamentary constituency in the United Kingdom, 1868-2024 | 1868-11-17 | 2024-05-30 | Yorkshire and the Humber | |
| Richmond (Yorks) | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Richmond Park | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | Royal Borough of Kingston upon Thames London Borough of Richmond upon Thames |
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| Richmond and Barnes | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Greater London | |
| Richmond and Northallerton | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Yorkshire and the Humber | ||
| Ripon | Parliamentary constituency in the United Kingdom, 1868-1983 | 1868-11-17 | 1983-05-13 | North Yorkshire | |
| Ripon | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Rochdale | Parliamentary constituency in the United Kingdom, 1832 onwards | 1832-12-08 | North West England | ||
| Rochester | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Kent | |
| Rochester | Parliamentary constituency in the United Kingdom (1801-1885) | 1801 | 1885-11-18 | ||
| Rochester and Chatham | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | ||
| Rochester and Strood | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | South East England | ||
| Rochford | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Rochford | |
| Rochford and Southend East | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | East of England | |
| Romford | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | London Borough of Havering | ||
| Romsey | Parliamentary constituency in the United Kingdom, 1983-2010 | 1983-06-09 | 2010-04-12 | Romsey | |
| Romsey and Southampton North | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | South East England | ||
| Roscommon | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Ross | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Ross and Cromarty | Parliamentary constituency in the United Kingdom, 1832-1983 | 1832-12-08 | 1983-05-13 | Scotland | |
| Ross, Cromarty and Skye | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Scotland | |
| Ross, Skye and Inverness West | Parliamentary constituency in the United Kingdom, 1997-2005 | 1997-05-01 | 2005-04-11 | Scotland | |
| Ross, Skye and Lochaber | Parliamentary constituency in Highland, Scotland, UK, 2005 onwards | 2005-05-05 | 2024-05-30 | Highland | |
| Ross-shire | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Scotland | |
| Rossendale | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | Rossendale | |
| Rossendale and Darwen | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | North West England | ||
| Rother Valley | Parliamentary constituency in the United Kingdom, 1918 onwards | 1918-12-14 | Yorkshire and the Humber | ||
| Rotherham | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | Yorkshire and the Humber | ||
| Rotherhithe | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | London | |
| Rothwell | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Rowley Regis and Tipton | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | ||
| Roxburgh and Berwickshire | Parliamentary constituency in the United Kingdom, 1983-2005 | 1983-06-09 | 2005-04-11 | Scotland | |
| Roxburgh and Selkirk | Parliamentary constituency in the United Kingdom, 1918-1955 | 1918-12-14 | 1955-05-06 | Scotland | |
| Roxburgh, Selkirk and Peebles | Parliamentary constituency in the United Kingdom, 1955-1983 | 1955-05-26 | 1983-05-13 | Scotland | |
| Roxburghshire | Parliamentary constituency in the United Kingdom, 1801-1918 | 1801 | 1918-11-25 | Scotland | |
| Royton | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Rugby | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | West Midlands | ||
| Rugby | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | Warwickshire | |
| Rugby and Kenilworth | Parliamentary constituency in the United Kingdom, 1983-2010 | 1983-06-09 | 2010-04-12 | Warwickshire | |
| Ruislip, Northwood and Pinner | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | London Borough of Hillingdon London Borough of Harrow |
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| Ruislip-Northwood | Parliamentary constituency in the United Kingdom, 1950-2010 | 1950-02-23 | 2010-04-12 | Greater London | |
| Runcorn | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | ||
| Runcorn and Helsby | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | North West England | ||
| Runnymede and Weybridge | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | South East England | ||
| Rushcliffe | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | East Midlands | ||
| Rutherglen | Parliamentary constituency in the United Kingdom, 1918-2005 | 1918-12-14 | 2005-04-11 | Scotland | |
| Rutherglen | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Scotland | ||
| Rutherglen and Hamilton West | Parliamentary constituency in South Lanarkshire, Scotland, UK, 2005 onwards | 2005-05-05 | 2024-05-30 | South Lanarkshire | |
| Rutland | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Rutland | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Rutland and Melton | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | East Midlands | |
| Rutland and Stamford | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | ||
| Rutland and Stamford | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | East Midlands | ||
| Rye | Parliamentary constituency in the United Kingdom, 1955-1983 | 1955-05-26 | 1983-05-13 | ||
| Rye | Parliamentary constituency in the United Kingdom, 1832-1950 | 1832-12-08 | 1950-02-03 | ||
| Rye | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801-01-01 | 1832-12-03 | ||
| Ryedale | Parliamentary constituency in the United Kingdom, 1983-2010 | 1983-06-09 | 2010-04-12 | Ryedale | |
| Saffron Walden | Parliamentary constituency in the United Kingdom, 1885-2024 | 1885-11-24 | 2024-05-30 | East of England | |
| Salford | Parliamentary constituency in the United Kingdom, 1997-2010 | 1997-05-01 | 2010-04-12 | Salford | |
| Salford | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | ||
| Salford | Parliamentary constituency in the United Kingdom, 1832-1868 | 1832-12-08 | 1868-11-11 | ||
| Salford | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Salford | ||
| Salford East | Parliamentary constituency in the United Kingdom, 1950-1997 | 1950-02-23 | 1997-04-08 | ||
| Salford North | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Salford South | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Salford West | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | ||
| Salford and Eccles | Parliamentary constituency in the United Kingdom, 2010-2024 | 2010-05-06 | 2024-05-30 | North West England | |
| Salisbury | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | South West England | ||
| Salisbury | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Saltash | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Cornwall | |
| Sandwich | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Scarborough | Parliamentary constituency in the United Kingdom, 1974-1997 | 1974-02-28 | 1997-04-08 | Yorkshire | |
| Scarborough | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Scarborough | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Scarborough and Whitby | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | Yorkshire and the Humber | ||
| Scarborough and Whitby | Parliamentary constituency in the United Kingdom, 1918-1974 | 1918-12-14 | 1974-02-08 | ||
| Scunthorpe | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | Yorkshire and the Humber | ||
| Seaford | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | East Sussex | |
| Seaham | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Sedgefield | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | North East England | |
| Sedgefield | Parliamentary constituency in the United Kingdom, 1918-1974 | 1918-12-14 | 1974-02-08 | ||
| Sefton Central | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | North West England | ||
| Selby | Parliamentary constituency in the United Kingdom, 1983-2010 | 1983-06-09 | 2010-04-12 | Selby | |
| Selby | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Selby | ||
| Selby and Ainsty | Parliamentary constituency in the United Kingdom, 2010-2024 | 2010-05-06 | 2024-05-30 | Yorkshire and the Humber | |
| Selkirkshire | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | Scotland | |
| Sevenoaks | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | South East England | ||
| Shaftesbury | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | Dorset | |
| Shaftesbury | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Sheffield | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| Sheffield Attercliffe | Parliamentary constituency in the United Kingdom, 1885-2010 | 1885-11-24 | 2010-04-12 | Sheffield | |
| Sheffield Brightside | Parliamentary constituency in the United Kingdom, 1885-2010 | 1885-11-24 | 2010-04-12 | Sheffield | |
| Sheffield Brightside and Hillsborough | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | Yorkshire and the Humber | ||
| Sheffield Central | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | Yorkshire and the Humber | ||
| Sheffield Central | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Sheffield Ecclesall | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Sheffield Hallam | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | Yorkshire and the Humber | ||
| Sheffield Heeley | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | Yorkshire and the Humber | ||
| Sheffield Hillsborough | Parliamentary constituency in the United Kingdom, 1918-2010 | 1918-12-14 | 2010-04-12 | Sheffield | |
| Sheffield Neepsend | Parliamentary constituency in the United Kingdom, 1950-1955 | 1950-02-23 | 1955-05-06 | ||
| Sheffield Park | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | ||
| Sheffield South East | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | Yorkshire and the Humber | ||
| Sherwood | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | East Midlands | |
| Sherwood Forest | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | East Midlands | ||
| Shipley | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | Yorkshire and the Humber | ||
| Shoreditch | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Shoreditch and Finsbury | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | ||
| Shoreham | Parliamentary constituency in the United Kingdom, 1974-1997 | 1974-02-28 | 1997-04-08 | Shoreham-by-Sea | |
| Shrewsbury | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | Shropshire | |
| Shrewsbury | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Shrewsbury | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Shropshire | ||
| Shrewsbury and Atcham | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | West Midlands | |
| Shropshire | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Shropshire Northern | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| Sidcup | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | ||
| Silvertown | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Sittingbourne and Sheppey | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | South East England | ||
| Skipton | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | Yorkshire | |
| Skipton and Ripon | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | Yorkshire and the Humber | ||
| Sleaford | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Sleaford and North Hykeham | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | East Midlands | ||
| Sligo Borough | Parliamentary constituency in the United Kingdom, 1801-1870 | 1801 | 1870 | Ireland | |
| Sligo County | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Slough | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | South East England | ||
| Smethwick | Parliamentary constituency in the United Kingdom, 1918-1974 | 1918-12-14 | 1974-02-08 | ||
| Smethwick | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | West Midlands | ||
| Solihull | Parliamentary constituency in the United Kingdom, 1945-2024 | 1945-07-05 | 2024-05-30 | West Midlands | |
| Solihull West and Shirley | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | West Midlands | ||
| Somerset | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Somerset North | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | South West England | |
| Somersetshire Northern | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Somerton and Frome | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | South West England | |
| South Angus | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | Scotland | |
| South Antrim | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | Northern Ireland | ||
| South Armagh | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| South Ayrshire | Parliamentary constituency in the United Kingdom, 1868-1983 | 1868-11-17 | 1983-05-13 | Scotland | |
| South Basildon and East Thurrock | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | East of England | ||
| South Bedfordshire | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | Bedfordshire | |
| South Buckinghamshire | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | ||
| South Cambridgeshire | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | East of England | ||
| South Cheshire | Parliamentary constituency in the United Kingdom, 1832-1868 | 1832-12-08 | 1868-11-11 | ||
| South Colchester and Maldon | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Essex | |
| South Cork | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| South Cotswolds | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South West England | ||
| South County Dublin | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| South Derbyshire | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | East Midlands | ||
| South Devon | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| South Devon | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South West England | ||
| South Donegal | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| South Dorset | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | South West England | ||
| South Down | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | Northern Ireland | ||
| South Durham | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| South East Cambridgeshire | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | East of England | |
| South East Cork | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| South East Cornwall | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | South West England | ||
| South East Derbyshire | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | Derbyshire | |
| South East Durham | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| South East Essex | Parliamentary constituency in the United Kingdom, 1955-1983 | 1955-05-26 | 1983-05-13 | ||
| South East Lancashire | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | ||
| South East Staffordshire | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Staffordshire | |
| South Essex | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | Essex | |
| South Fermanagh | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| South Galway | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| South Glamorganshire | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Wales | |
| South Gloucestershire | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | Gloucestershire | |
| South Hampshire | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| South Hams | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Devon | |
| South Hertfordshire | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | ||
| South Holland and The Deepings | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | East Midlands | ||
| South Kerry | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| South Kildare | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| South Kilkenny | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| South Lanarkshire | Parliamentary constituency in the United Kingdom, 1868-1918 | 1868-11-17 | 1918-11-25 | Scotland | |
| South Lancashire | Parliamentary constituency in the United Kingdom, 1861-1868 | 1861 | 1868-11-11 | ||
| South Lancashire | Parliamentary constituency in the United Kingdom, 1832-1861 | 1832-12-08 | 1861 | ||
| South Leicestershire | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | East Midlands | ||
| South Leitrim | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Ireland | |
| South Lincolnshire | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| South Londonderry | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| South Longford | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Ireland | |
| South Louth | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Ireland | |
| South Mayo | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| South Meath | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| South Molton | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | Devon | |
| South Monaghan | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| South Monmouthshire | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Wales | |
| South Norfolk | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | East of England | ||
| South Norfolk | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | ||
| South Northamptonshire | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | East Midlands | ||
| South Northumberland | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| South Nottinghamshire | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| South Ribble | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | North West England | ||
| South Roscommon | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| South Shields | Parliamentary constituency in the United Kingdom, 1832 onwards | 1832-12-08 | North East England | ||
| South Shropshire | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| South Shropshire | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | West Midlands | ||
| South Sligo | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| South Somerset | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| South Staffordshire | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | West Midlands | |
| South Suffolk | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | East of England | ||
| South Swindon | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | South West England | |
| South Thanet | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | South East England | |
| South Tipperary | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| South Tyrone | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| South Warwickshire | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| South West Bedfordshire | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | East of England | |
| South West Cambridgeshire | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | ||
| South West Devon | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | South West England | ||
| South West Hertfordshire | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | East of England | ||
| South West Lancashire | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | ||
| South West Norfolk | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | East of England | ||
| South West Staffordshire | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | Staffordshire | |
| South West Surrey | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | South East England | |
| South West Wiltshire | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | South West England | ||
| South Westmeath | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Ireland | |
| South Wexford | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| South Wiltshire | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| South Worcestershire | Parliamentary constituency in the United Kingdom, 1950-1997 | 1950-02-23 | 1997-04-08 | ||
| Southall | Parliamentary constituency in the United Kingdom, 1945-1983 | 1945-07-05 | 1983-05-13 | ||
| Southampton | Parliamentary constituency in the United Kingdom, 1801-1950 | 1801 | 1950-02-03 | Southampton | |
| Southampton Itchen | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | South East England | ||
| Southampton Test | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | South East England | ||
| Southend | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Southend East | Parliamentary constituency in the United Kingdom, 1950-1997 | 1950-02-23 | 1997-04-08 | ||
| Southend East and Rochford | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | East of England | ||
| Southend West | Parliamentary constituency in the United Kingdom, 1950-2024 | 1950-02-23 | 2024-05-30 | East of England | |
| Southend West and Leigh | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | East of England | ||
| Southern West Riding of Yorkshire | Parliamentary constituency in the United Kingdom, 1865-1885 | 1865-07-11 | 1885-11-18 | ||
| Southgate and Wood Green | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | London | ||
| Southport | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | North West England | ||
| Southwark | Parliamentary constituency in the United Kingdom, 1950–1974 | 1950-02-23 | 1974-02-08 | ||
| Southwark | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Southwark Central | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Southwark North | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Southwark South East | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Southwark West | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Southwark and Bermondsey | Parliamentary constituency in the United Kingdom, 1983–1997 | 1983-06-09 | 1997-04-08 | London Borough of Southwark | |
| Sowerby | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | Sowerby | |
| Spalding | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Spelthorne | Parliamentary constituency in the United Kingdom, 1918 onwards | 1918-12-14 | South East England | ||
| Spen Valley | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Spen Valley | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Yorkshire and the Humber | ||
| Spennymoor | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| St Albans | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | East of England | ||
| St Albans | Parliamentary constituency in the United Kingdom, 1660-1852 | 1801-01-01 | 1852-07-01 | ||
| St Andrews Burghs | Parliamentary constituency in the United Kingdom, 1832-1918 | 1832-12-08 | 1918-11-25 | Scotland | |
| St Augustine's | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| St Austell | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| St Austell and Newquay | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | South West England | ||
| St George | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| St Germans | Parliamentary constituency in the United Kingdom, 1801–1832 | 1801 | 1832-12-03 | ||
| St Helens | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | ||
| St Helens North | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | North West England | ||
| St Helens South | Parliamentary constituency in the United Kingdom, 1983-2010 | 1983-06-09 | 2010-04-12 | St Helens | |
| St Helens South and Whiston | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | North West England | ||
| St Ives | Parliamentary constituency in the United Kingdom, 1832 onwards | 1832-12-08 | South West England | ||
| St Ives | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| St Marylebone | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Greater London | |
| St Mawes | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Cornwall | |
| St Neots and Mid Cambridgeshire | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | East of England | ||
| St Pancras East | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| St Pancras North | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | ||
| St Pancras South | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| St Pancras South East | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| St Pancras South West | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| St Pancras West | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Stafford | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | West Midlands | ||
| Stafford | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Stafford | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Stafford and Stone | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | ||
| Staffordshire | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Staffordshire | |
| Staffordshire Moorlands | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | West Midlands | ||
| Staffordshire Southern | Parliamentary constituency in the United Kingdom, 1832-1868 | 1832-12-10 | 1868-11-11 | ||
| Stalybridge | Parliamentary constituency in the United Kingdom, 1868-1918 | 1868-11-17 | 1918-11-25 | ||
| Stalybridge and Hyde | Parliamentary constituency in the United Kingdom, 1918 onwards | 1918-12-14 | North West England | ||
| Stamford | Parliamentary constituency in the United Kingdom, 1868-1918 | 1868-11-17 | 1918-11-25 | ||
| Stamford | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Stamford and Spalding | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Lincolnshire | |
| Stepney | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | ||
| Stepney and Poplar | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | ||
| Stevenage | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | East of England | ||
| Steyning | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Sussex | |
| Stirling | Parliamentary constituency in Stirling, Scotland, UK, 1983 onwards | 1983-06-09 | 2024-05-30 | Stirling | |
| Stirling Burghs | Parliamentary constituency in the United Kingdom, 1801-1918 | 1801 | 1918-11-25 | West Lothian | |
| Stirling and Falkirk | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Scotland | |
| Stirling and Strathallan | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Scotland | ||
| Stirlingshire | Parliamentary constituency in the United Kingdom, 1801-1918 | 1801 | 1918-11-25 | Scotland | |
| Stockbridge | Parliamentary constituency in the United Kingdom, 1801–1832 | 1801 | 1832-12-03 | ||
| Stockport | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | North West England | ||
| Stockport | Parliamentary constituency in the United Kingdom, 1832-1950 | 1832-12-08 | 1950-02-03 | ||
| Stockport North | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | Stockport | |
| Stockport South | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | Stockport | |
| Stockton North | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | North East England | ||
| Stockton South | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | North East England | |
| Stockton West | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | North East England | ||
| Stockton-on-Tees | Parliamentary constituency in the United Kingdom, 1868-1983 | 1868-11-17 | 1983-05-13 | Stockton-on-Tees | |
| Stoke Newington | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | County of London | |
| Stoke-on-Trent Central | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | West Midlands | ||
| Stoke-on-Trent North | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | West Midlands | ||
| Stoke-on-Trent South | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | West Midlands | ||
| Stoke-on-Trent, Stoke | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Stoke-upon-Trent | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Stoke-upon-Trent | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| Stone | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | West Midlands | |
| Stone | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Stone, Great Wyrley and Penkridge | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | West Midlands | ||
| Stourbridge | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | West Midlands | ||
| Stourbridge | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Stowmarket | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Strand | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Strangford | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | Northern Ireland | ||
| Stratford West Ham | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Stratford and Bow | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | London | ||
| Stratford-on-Avon | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | West Midlands | ||
| Stratford-on-Avon | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Strathkelvin and Bearsden | Parliamentary constituency in the United Kingdom, 1983-2005 | 1983-06-09 | 2005-04-11 | Scotland | |
| Streatham | Parliamentary constituency in the United Kingdom, 1918-2024 | 1918-12-14 | 2024-05-30 | London Borough of Lambeth | |
| Streatham and Croydon North | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | London | ||
| Stretford | Parliamentary constituency in the United Kingdom, 1885-1997 | 1885-11-24 | 1997-04-08 | Greater Manchester | |
| Stretford and Urmston | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | North West England | ||
| Stroud | Parliamentary constituency in the United Kingdom, 1955 onwards | 1955-05-26 | South West England | ||
| Stroud | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Stroud | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| Stroud and Thornbury | Parliamentary constituency in the United Kingdom, 1950-1955 | 1950-02-23 | 1955-05-06 | ||
| Sudbury | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Sudbury | Parliamentary constituency in the United Kingdom, 1801-1844 | 1801-01-01 | 1844 | ||
| Sudbury and Woodbridge | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | ||
| Suffolk | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Suffolk Coastal | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | East of England | ||
| Sunderland | Parliamentary constituency in the United Kingdom, 1832-1950 | 1832-12-08 | 1950-02-03 | ||
| Sunderland Central | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | North East England | ||
| Sunderland North | Parliamentary constituency in the United Kingdom, 1950-2010 | 1950-02-23 | 2010-04-12 | North East England | |
| Sunderland South | Parliamentary constituency in the United Kingdom, 1950-2010 | 1950-02-23 | 2010-04-12 | Sunderland | |
| Surbiton | Parliamentary constituency in the United Kingdom, 1955-1997 | 1955-05-26 | 1997-04-08 | ||
| Surrey | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Surrey Eastern | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| Surrey Heath | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | South East England | ||
| Sussex | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Sussex Weald | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South East England | ||
| Sutherland | Parliamentary constituency in the United Kingdom, 1801-1918 | 1801 | 1918-11-25 | Scotland | |
| Sutton Coldfield | Parliamentary constituency in the United Kingdom, 1945 onwards | 1945-07-05 | West Midlands | ||
| Sutton and Cheam | Parliamentary constituency in the United Kingdom, 1945 onwards | 1945-07-05 | London Borough of Sutton | ||
| Swansea | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Wales | |
| Swansea District | Parliamentary constituency in the United Kingdom, 1832-1918 | 1832-12-08 | 1918-11-25 | Glamorgan Wales |
|
| Swansea East | Parliamentary constituency in the United Kingdom, 1918-2024 | 1918-12-14 | 2024-05-30 | Swansea | |
| Swansea West | Parliamentary constituency in the United Kingdom, 1918 onwards | 1918-12-14 | Swansea | ||
| Swindon | Parliamentary constituency in the United Kingdom, 1918-1997 | 1918-12-14 | 1997-04-08 | Swindon | |
| Swindon North | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South West England | ||
| Swindon South | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South West England | ||
| Tain Burghs | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Scotland | |
| Tamworth | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | West Midlands | ||
| Tamworth | Parliamentary constituency in the United Kingdom, 1885-1945 | 1885-11-24 | 1945-06-15 | ||
| Tamworth | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Tatton | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | North West England | ||
| Taunton | Parliamentary constituency in the United Kingdom, 1885-2010 | 1885-11-24 | 2010-04-12 | Somerset | |
| Taunton | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Taunton Deane | Parliamentary constituency in the United Kingdom, 2010-2024 | 2010-05-06 | 2024-05-30 | South West England | |
| Taunton and Wellington | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South West England | ||
| Tavistock | Parliamentary constituency in the United Kingdom, 1868-1974 | 1868-11-17 | 1974-02-08 | Devon | |
| Tavistock | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Teignbridge | Parliamentary constituency in the United Kingdom, 1983-2010 | 1983-06-09 | 2010-04-12 | Teignbridge | |
| Telford | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | West Midlands | ||
| Tewkesbury | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | South West England | ||
| Tewkesbury | Parliamentary constituency in the United Kingdom, 1868-1918 | 1868-11-17 | 1918-11-25 | ||
| Tewkesbury | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Thanet East | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | Thanet | |
| Thanet West | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | ||
| The Cotswolds | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | South West England | |
| The Hartlepools | Parliamentary constituency in the United Kingdom, 1868-1974 | 1868-11-17 | 1974-02-08 | ||
| The Wrekin | Parliamentary constituency in the United Kingdom, 1918 onwards | 1918-12-14 | West Midlands | ||
| Thetford | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Thirsk | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| Thirsk | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Thirsk and Malton | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | Yorkshire and the Humber | ||
| Thirsk and Malton | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | ||
| Thornaby | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | Thornaby | |
| Thornbury | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Thornbury and Yate | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | South West England | ||
| Thurrock | Parliamentary constituency in the United Kingdom, 1945 onwards | 1945-07-05 | East of England | ||
| Tipperary | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Tipton and Wednesbury | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | West Midlands | ||
| Tiverton | Parliamentary constituency in the United Kingdom, 1885-1997 | 1885-11-24 | 1997-04-08 | Tiverton | |
| Tiverton | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Tiverton and Honiton | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | South West England | |
| Tiverton and Minehead | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South West England | ||
| Tonbridge | Parliamentary constituency in the United Kingdom, 1918-1974 | 1918-12-14 | 1974-02-08 | ||
| Tonbridge | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South East England | ||
| Tonbridge and Malling | Parliamentary constituency in the United Kingdom, 1974-2024 | 1974-02-28 | 2024-05-30 | South East England | |
| Tooting | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | London Borough of Wandsworth | ||
| Torbay | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | South West England | ||
| Torfaen | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | Torfaen | ||
| Torquay | Parliamentary constituency in the United Kingdom, 1885-1974 | 1885-11-24 | 1974-02-08 | Devon | |
| Torridge and Tavistock | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South West England | ||
| Torridge and West Devon | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | South West England | |
| Torrington | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | Devon | |
| Totnes | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | South West England | |
| Totnes | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | ||
| Totnes | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Tottenham | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | London Borough of Haringey | ||
| Tottenham | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Tottenham North | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Tottenham South | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Tower Hamlets | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | Middlesex | |
| Tower Hamlets Stepney | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Tralee | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Tregony | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Truro | Parliamentary constituency in the United Kingdom, 1950-1997 | 1950-02-23 | 1997-04-08 | Truro | |
| Truro | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Truro | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Truro and Falmouth | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | South West England | ||
| Truro and St Austell | Parliamentary constituency in the United Kingdom, 1997-2010 | 1997-05-01 | 2010-04-12 | South West England | |
| Tullamore | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Ireland | |
| Tunbridge | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Tunbridge Wells | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | South East England | ||
| Tweeddale, Ettrick and Lauderdale | Parliamentary constituency in the United Kingdom, 1983-2005 | 1983-06-09 | 2005-04-11 | Scotland | |
| Twickenham | Parliamentary constituency in the United Kingdom, 1918 onwards | 1918-12-14 | London Borough of Richmond upon Thames | ||
| Tyne Bridge | Parliamentary constituency in the United Kingdom, 1983-2010 | 1983-06-09 | 2010-04-12 | Tyne and Wear | |
| Tynemouth | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | North East England | ||
| Tynemouth and North Shields | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| Tyneside | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Tyrone | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| University of Wales | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | Wales | |
| Upminster | Parliamentary constituency in the United Kingdom, 1974-2010 | 1974-02-28 | 2010-04-12 | Upminster | |
| Upper Bann | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | Northern Ireland | ||
| Upton | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Uxbridge | Parliamentary constituency in the United Kingdom, 1885-2010 | 1885-11-24 | 2010-04-12 | Greater London | |
| Uxbridge and South Ruislip | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | London Borough of Hillingdon | ||
| Vale of Clwyd | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | Denbighshire | |
| Vale of Glamorgan | parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | Vale of Glamorgan | ||
| Vale of York | Parliamentary constituency in the United Kingdom, 1997-2010 | 1997-05-01 | 2010-04-12 | North Yorkshire | |
| Vauxhall | Parliamentary constituency in the United Kingdom, 1950-2024 | 1950-02-23 | 2024-05-30 | London Borough of Lambeth | |
| Vauxhall and Camberwell Green | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | London | ||
| Wakefield | Parliamentary constituency in the United Kingdom, 1832-2024 | 1832-12-08 | 2024-05-30 | Yorkshire and the Humber | |
| Wakefield and Rothwell | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Yorkshire and the Humber | ||
| Wallasey | Parliamentary constituency in the United Kingdom, 1918 onwards | 1918-12-14 | North West England | ||
| Wallingford | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| Wallingford | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Wallsend | Parliamentary constituency in the United Kingdom, 1918-1997 | 1918-12-14 | 1997-04-08 | Wallsend | |
| Walsall | Parliamentary constituency in the United Kingdom, 1832-1955 | 1832-12-08 | 1955-05-06 | ||
| Walsall North | Parliamentary constituency in the United Kingdom, 1955-2024 | 1955-05-26 | 2024-05-30 | West Midlands | |
| Walsall South | Parliamentary constituency in the United Kingdom, 1955-2024 | 1955-05-26 | 2024-05-30 | West Midlands | |
| Walsall and Bloxwich | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | West Midlands | ||
| Walthamstow | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | London Borough of Waltham Forest | ||
| Walthamstow | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Walthamstow East | Parliamentary constituency in the United Kingdom, 1918-1974 | 1918-12-14 | 1974-02-08 | Essex | |
| Walthamstow West | Parliamentary constituency in the United Kingdom, 1918-1974 | 1918-12-14 | 1974-02-08 | Walthamstow | |
| Wandsworth | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Wandsworth Central | Parliamentary constituency in the United Kingdom, 1918-1974 | 1918-12-14 | 1974-02-08 | ||
| Wansbeck | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | North East England | |
| Wansbeck | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Wansdyke | Parliamentary constituency in the United Kingdom, 1983-2010 | 1983-06-09 | 2010-04-12 | Somerset | |
| Wanstead and Woodford | Parliamentary constituency in the United Kingdom, 1964-1997 | 1964-10-15 | 1997-04-08 | Greater London | |
| Wantage | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | South East England | |
| Wareham | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | Dorset | |
| Wareham | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Warley | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | West Midlands | |
| Warley East | Parliamentary constituency in the United Kingdom, 1974-1997 | 1974-02-28 | 1997-04-08 | ||
| Warley West | Parliamentary constituency in the United Kingdom, 1974-1997 | 1974-02-28 | 1997-04-08 | ||
| Warrington | Parliamentary constituency in the United Kingdom, 1832-1983 | 1832-12-08 | 1983-05-13 | Warrington | |
| Warrington North | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | North West England | ||
| Warrington South | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | North West England | ||
| Warwick | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Warwickshire | |
| Warwick and Leamington | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | West Midlands | ||
| Warwickshire | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Warwickshire | |
| Warwickshire Northern | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| Washington and Gateshead South | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | North East England | ||
| Washington and Sunderland West | Parliamentary constituency in the United Kingdom, 2010-2024 | 2010-05-06 | 2024-05-30 | North East England | |
| Waterford City | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| Waterford City | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Ireland | |
| Waterford City | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | Ireland | |
| Waterloo | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Watford | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | East of England | ||
| Waveney | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | East of England | |
| Waveney Valley | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | East of England | ||
| Weald of Kent | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South East England | ||
| Wealden | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | South East England | |
| Weaver Vale | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | North West England | |
| Wednesbury | Parliamentary constituency in the United Kingdom, 1868-1974 | 1868-11-17 | 1974-02-08 | ||
| Wellingborough | Parliamentary constituency in the United Kingdom, 1918-2024 | 1918-12-14 | 2024-05-30 | East Midlands | |
| Wellingborough and Rushden | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | East Midlands | ||
| Wellington (Shropshire) | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Wellington (Somerset) | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Wells | Parliamentary constituency in the United Kingdom, 1885-2024 | 1885-11-24 | 2024-05-30 | South West England | |
| Wells | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Wells and Mendip Hills | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | South West England | ||
| Welwyn Hatfield | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | East of England | ||
| Wembley North | Parliamentary constituency in the United Kingdom, 1945-1974 | 1945-07-05 | 1974-02-08 | ||
| Wembley South | Parliamentary constituency in the United Kingdom, 1945-1974 | 1945-07-05 | 1974-02-08 | ||
| Wendover | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Wenlock | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Wentworth | Parliamentary constituency in the United Kingdom, 1983-2010 | 1983-06-09 | 2010-04-12 | ||
| Wentworth | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Wentworth and Dearne | Parliamentary constituency in the United Kingdom, 2010-2024 | 2010-05-06 | 2024-05-30 | Yorkshire and the Humber | |
| Weobley | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| West Aberdeenshire | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | Scotland | |
| West Aberdeenshire and Kincardine | Parliamentary constituency in Aberdeenshire, Scotland, UK, 1997 onwards | 1997-05-01 | Aberdeenshire | ||
| West Bromwich | Parliamentary constituency in the United Kingdom, 1885-1974 | 1885-11-24 | 1974-02-08 | West Midlands | |
| West Bromwich | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | West Midlands | ||
| West Bromwich East | Parliamentary constituency in the United Kingdom, 1974-2024 | 1974-02-28 | 2024-05-30 | West Midlands | |
| West Bromwich West | Parliamentary constituency in the United Kingdom, 1974-2024 | 1974-02-28 | 2024-05-30 | West Midlands | |
| West Carmarthenshire | Parliamentary constituency in the United Kingdom, 1885–1918 | 1885-11-24 | 1918-11-25 | Wales | |
| West Cavan | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| West Chelmsford | Parliamentary constituency in the United Kingdom, 1997-2010 | 1997-05-01 | 2010-04-12 | Chelmsford | |
| West Cheshire | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | ||
| West Clare | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| West Cork | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| West Cornwall | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | Cornwall | |
| West Cumberland | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| West Denbighshire | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Wales | |
| West Derbyshire | Parliamentary constituency in the United Kingdom, 1885-2010 | 1885-11-24 | 2010-04-12 | Derbyshire | |
| West Devon | Parliamentary constituency in the United Kingdom, 1974-1983 | 1974-02-28 | 1983-05-13 | ||
| West Donegal | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| West Dorset | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | South West England | ||
| West Down | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| West Dunbartonshire | Parliamentary constituency in West Dunbartonshire, Scotland, UK, 2005 onwards | 2005-05-05 | West Dunbartonshire | ||
| West Essex | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | ||
| West Fife | Parliamentary constituency in the United Kingdom, 1885-1974 | 1885-11-24 | 1974-02-08 | Scotland | |
| West Flintshire | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | Wales | |
| West Gloucestershire | Parliamentary constituency in the United Kingdom, 1950-1997 | 1950-02-23 | 1997-04-08 | Gloucestershire | |
| West Ham | Parliamentary constituency in the United Kingdom, 1997-2024 | 1997-05-01 | 2024-05-30 | London Borough of Newham | |
| West Ham North | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | ||
| West Ham North | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| West Ham South | Parliamentary constituency in the United Kingdom, 1950-1974 | 1950-02-23 | 1974-02-08 | ||
| West Ham South | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| West Ham and Beckton | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | London | ||
| West Hertfordshire | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Hertfordshire | |
| West Kent | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| West Kerry | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| West Lancashire | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | North West England | ||
| West Limerick | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| West Looe | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| West Lothian | Parliamentary constituency in the United Kingdom, 1950-1983 | 1950-02-23 | 1983-05-13 | Scotland | |
| West Mayo | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| West Monmouthshire | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Wales | |
| West Norfolk | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| West Perthshire | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Scotland | |
| West Renfrewshire | Parliamentary constituency in the United Kingdom, 1997-2005 | 1997-05-01 | 2005-04-11 | Renfrewshire | |
| West Riding of Yorkshire | Parliamentary constituency in the United Kingdom, 1832-1865 | 1832-12-08 | 1865-07-06 | ||
| West Somerset | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| West Staffordshire | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| West Staffordshire | Parliamentary constituency in the United Kingdom, 1868-1885 | 1868-11-17 | 1885-11-18 | ||
| West Stirlingshire | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Scotland | |
| West Suffolk | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | East of England | ||
| West Surrey | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| West Sussex | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| West Tyrone | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | Northern Ireland | ||
| West Waterford | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Ireland | |
| West Wicklow | Parliamentary constituency in the United Kingdom, 1885-1922 | 1885-11-24 | 1922-10-26 | Ireland | |
| West Worcestershire | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | West Midlands | ||
| Westbury | Parliamentary constituency in the United Kingdom, 1832-2010 | 1832-12-08 | 2010-04-12 | Wiltshire | |
| Westbury | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Western Division of Suffolk | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | Suffolk | |
| Westhoughton | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | ||
| Westmeath | historical UK parliamentary constituency, ended upon Irish independence | 1918-12-14 | 1922-10-26 | Ireland | |
| Westmeath | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801-01-01 | 1885-11-18 | Ireland | |
| Westminster | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | Inner London | |
| Westminster | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Westminster Abbey | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Westminster North | Parliamentary constituency in the United Kingdom, 2010-2024 | 2010-05-06 | 2024-05-30 | City of Westminster | |
| Westminster North | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | London | |
| Westminster St George's | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Westmorland | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Westmorland | |
| Westmorland | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Westmorland and Lonsdale | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | North West England | ||
| Weston-super-Mare | Parliamentary constituency in the United Kingdom, 1918 onwards | 1918-12-14 | South West England | ||
| Wetherby and Easingwold | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | Yorkshire and the Humber | ||
| Wexford Borough | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Weymouth and Melcombe Regis | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | Dorset | |
| Weymouth and Melcombe Regis | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Whitby | Parliamentary constituency in the United Kingdom, 1832-1918 | 1832-12-08 | 1918-11-25 | ||
| Whitchurch | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Hampshire | |
| Whitechapel | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Whitechapel and St Georges | Parliamentary constituency in the United Kingdom, 1918-1950 | 1918-12-14 | 1950-02-03 | ||
| Whitehaven | Parliamentary constituency in the United Kingdom, 1832-1983 | 1832-12-08 | 1983-05-13 | Whitehaven | |
| Whitehaven and Workington | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | North West England | ||
| Wick Burghs | Parliamentary constituency in the United Kingdom, 1832-1918 | 1832-12-08 | 1918-11-25 | Scotland | |
| Wicklow | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland | |
| Widnes | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | ||
| Widnes and Halewood | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | North West England | ||
| Wigan | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | North West England | ||
| Wigan | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Wigtown Burghs | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Dumfries and Galloway | |
| Wigtownshire | Parliamentary constituency in the United Kingdom, 1801-1918 | 1801 | 1918-11-25 | Dumfries and Galloway | |
| Willesden East | Parliamentary constituency in the United Kingdom, 1918-1974 | 1918-12-14 | 1974-02-08 | ||
| Willesden West | Parliamentary constituency in the United Kingdom, 1918-1974 | 1918-12-14 | 1974-02-08 | ||
| Wilton | Parliamentary constituency in the United Kingdom, 1832-1918 | 1832-12-08 | 1918-11-25 | ||
| Wilton | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Wiltshire | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Wiltshire | |
| Wiltshire Northern | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| Wimbledon | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | London Borough of Merton | ||
| Winchelsea | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Winchester | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | South East England | ||
| Winchester | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Windsor | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | South East England | ||
| Windsor | Parliamentary constituency in the United Kingdom, 1868-1974 | 1868-11-17 | 1974-02-08 | ||
| Windsor | Parliamentary constituency in the United Kingdom, 1801-1868 | 1801 | 1868-11-11 | ||
| Windsor and Maidenhead | Parliamentary constituency in the United Kingdom, 1974-1997 | 1974-02-28 | 1997-04-08 | Windsor and Maidenhead | |
| Wirral | Parliamentary constituency in the United Kingdom, 1885-1983 | 1885-11-24 | 1983-05-13 | Wirral | |
| Wirral South | Parliamentary constituency in the United Kingdom, 1983-2024 | 1983-06-09 | 2024-05-30 | North West England | |
| Wirral West | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | North West England | ||
| Wisbech | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Witham | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | East of England | ||
| Witney | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | South East England | ||
| Woking | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | South East England | ||
| Wokingham | parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | South East England | ||
| Wokingham | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Wolverhampton | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| Wolverhampton East | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | Staffordshire | |
| Wolverhampton North East | Parliamentary constituency in the United Kingdom, 1950 onwards | 1950-02-23 | West Midlands | ||
| Wolverhampton South | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Wolverhampton South East | Parliamentary constituency in the United Kingdom, 1974 onwards | 1974-02-28 | West Midlands | ||
| Wolverhampton South West | Parliamentary constituency in the United Kingdom, 1950-2024 | 1950-02-23 | 2024-05-30 | West Midlands | |
| Wolverhampton West | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Wolverhampton West | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | West Midlands | ||
| Wood Green | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Greater London | |
| Woodbridge | Parliamentary constituency in the United Kingdom, 1885-1950 | 1885-11-24 | 1950-02-03 | ||
| Woodford | Parliamentary constituency in the United Kingdom, 1945-1964 | 1945-07-05 | 1964-09-25 | ||
| Woodspring | Parliamentary constituency in the United Kingdom, 1983-2010 | 1983-06-09 | 2010-04-12 | ||
| Woodstock | Parliamentary constituency in the United Kingdom, 1832-1918 | 1832-12-08 | 1918-11-25 | Oxfordshire | |
| Woodstock | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Woolwich | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Greater London | |
| Woolwich | Parliamentary constituency in the United Kingdom, 1885-1918 | 1885-11-24 | 1918-11-25 | ||
| Woolwich East | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | Woolwich | |
| Woolwich West | Parliamentary constituency in the United Kingdom, 1918-1983 | 1918-12-14 | 1983-05-13 | ||
| Wootton Bassett | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Wiltshire | |
| Worcester | Parliamentary constituency in the United Kingdom, 1885 onwards | 1885-11-24 | West Midlands | ||
| Worcester | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | ||
| Worcestershire | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | Worcestershire | |
| Worcestershire Western | Parliamentary constituency in the United Kingdom, 1832-1885 | 1832-12-08 | 1885-11-18 | ||
| Workington | Parliamentary constituency in the United Kingdom, 1918-2024 | 1918-12-14 | 2024-05-30 | North West England | |
| Worsley | Parliamentary constituency in the United Kingdom, 1983-2010 | 1983-06-09 | 2010-04-12 | Worsley | |
| Worsley and Eccles | Parliamentary constituency in the United Kingdom, 2024 onwards | 2024-07-04 | North West England | ||
| Worsley and Eccles South | Parliamentary constituency in the United Kingdom, 2010-2024 | 2010-05-06 | 2024-05-30 | North West England | |
| Worthing | Parliamentary constituency in the United Kingdom, 1945-1997 | 1945-07-05 | 1997-04-08 | Worthing | |
| Worthing West | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | South East England | ||
| Wrexham | Parliamentary constituency in the United Kingdom, 1918 onwards | 1918-12-14 | Wrexham County Borough | ||
| Wycombe | Parliamentary constituency in the United Kingdom, 1868 onwards | 1868-11-17 | South East England | ||
| Wycombe | Parliamentary constituency in the United Kingdom (1801-1868) | 1801-01-01 | 1868-11-11 | ||
| Wyre | Parliamentary constituency in the United Kingdom, 1983-1997 | 1983-06-09 | 1997-04-08 | Lancashire | |
| Wyre Forest | Parliamentary constituency in the United Kingdom, 1983 onwards | 1983-06-09 | West Midlands | ||
| Wyre and Preston North | Parliamentary constituency in the United Kingdom, 2010-2024 | 2010-05-06 | 2024-05-30 | North West England | |
| Wythenshawe and Sale East | Parliamentary constituency in the United Kingdom, 1997 onwards | 1997-05-01 | North West England | ||
| Yarmouth (Isle of Wight) | Parliamentary constituency in the United Kingdom, 1801-1832 | 1801 | 1832-12-03 | ||
| Yeovil | Parliamentary constituency in the United Kingdom, 1918 onwards | 1918-12-14 | South West England | ||
| Ynys Môn | Parliamentary constituency in the United Kingdom, 1801 onwards | 1801 | Isle of Anglesey | ||
| York Central | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | Yorkshire and the Humber | ||
| York Outer | Parliamentary constituency in the United Kingdom, 2010 onwards | 2010-05-06 | Yorkshire and the Humber | ||
| Yorkshire | Parliamentary constituency in the United Kingdom, 1826-1832 | 1826-06-07 | 1832-12-03 | Yorkshire | |
| Yorkshire | Parliamentary constituency in the United Kingdom, 1801-1826 | 1801 | 1826-06-02 | Yorkshire | |
| Youghal | Parliamentary constituency in the United Kingdom, 1801-1885 | 1801 | 1885-11-18 | Ireland |
End of automatically generated list.