1920 Dublin County Council election

Republican Sinn Féin or RSF is an Irish republican political party in Ireland. RSF claims to be heirs of the Sinn Féin party founded in 1905; the party took its present form in 1986 following a split in Sinn Féin. RSF members take seats when elected to local government in the Republic of Ireland, but do not recognise the validity of the Partition of Ireland. It subsequently does not recognise the legitimacy of the parliaments of Northern Ireland (Stormont) or the Republic of Ireland, so the party does not register itself with them.

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Seán Lynch MLA is an Irish republican Sinn Féin politician and a former MLA for the constituency of Fermanagh and South Tyrone. He was a former Provisional Irish Republican Army (IRA) leader in the Maze Prison.

Elections were held in January and June 1920 for the various county and district councils of Ireland. The elections were organised by the Dublin Castle administration under the law of the then United Kingdom of Great Britain and Ireland (UK), and held while the Irish War of Independence was pitting UK forces against those of the Irish Republic proclaimed in 1919 by the First Dáil. Elections were held in two stages: borough and urban district councils in January; and county and rural district councils in June. Sinn Féin, which had established the First Dáil, won control of many of the councils, which subsequently broke contact with Dublin Castle's Local Government Board for Ireland and instead recognised the republican Department of Local Government. The election results provide historians with a barometer of public opinion in what would be the last elections administered on an all-island basis: the Government of Ireland Act 1920 passed at the end of the year effected the partition of Ireland from 1921, though the elections for the two home rule Parliaments envisaged by it were held on the same day; No further elections would be held simultaneously across the island of Ireland until 1979, when representatives of the Republic of Ireland and Northern Ireland to the European Parliament were elected. The next local elections were held in 1924 in Northern Ireland and in 1925 in the Irish Free State.

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The 1920 Antrim County Council election was held on Thursday, 3 June 1920.

The 2019 election to the Newry, Mourne and Down District Council, part of the Northern Ireland local elections that were held on 2 May 2019 returned 41 members to the council via Single Transferable Vote.

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Local elections were held in Northern Ireland on 18 May 2023. The elections were delayed by two weeks to avoid overlapping with the coronation of King Charles III. Following the elections, Sinn Féin became the largest party in local government for the first time. It also marked the first time that nationalist parties had garnered a greater share of the vote than unionist parties, however, despite this, there were more unionist councillors elected than nationalists.