Gweld cod am Arolygon barn ar annibyniaeth i Gymru

{{Gwleidyddiaeth Cymru}}Dyma restr o arolygon barn sydd yn ymwneud â [[Annibyniaeth i Gymru]].
[[Delwedd:Eddie Butler at the Third National March for Welsh Independence 7 September 2019 01.jpg|chwith|bawd|280x280px|Gorymdaith dros annibyniaeth Merthyr, Medi 2019]]

{{Clirio}}

== Arolygon Ie/Na dros annibyniaeth ==
{| class="wikitable sortable" style="text-align:center;font-size:95%;"
! rowspan="2" |Dyddiad
! rowspan="2" |Trefnwr
! rowspan="2" |Maint sampl
! colspan="3" |A ddylai Cymru fod yn wlad annibynnol?
! rowspan="2" |Eithrio ddim yn gwybod
! rowspan="2" |Arwain
|-
! style="background:green; color:white;" |Ie
! style="background:#dc241f; color:white;" |Na
! style="background:silver;" |Di-benderfyniad
|-
|2-8 Medi 2024
|[https://d3nkl3psvxxpe9.cloudfront.net/documents/Internal_Wales_Devolution_240908.pdf YouGov]
|1,207
|24%
|style="background: rgb(233, 107, 103); "|61%
|15%
|28% i 72%
|style="background: rgb(220, 36, 31); color:white;"|37%
|-
|3-7 Mehefin 2024
|[https://redfieldandwiltonstrategies.com/latest-welsh-westminster-and-senedd-voting-intention-5-7-june-2024/ Redfield & Wilton Strategies]
|960
|33%
|style="background: rgb(233, 107, 103); "|57%
|10%
|37% i 63%
|style="background: rgb(220, 36, 31); color:white;"|24%
|-
|30 Mai-03 Mehefin 2024
|[https://d3nkl3psvxxpe9.cloudfront.net/documents/Results_BarnCymru_GE2024_FirstCall_W.pdf YouGov]
|1066
|24%
|style="background: rgb(233, 107, 103); "|53%
|14%
|31% i 69%
|style="background: rgb(220, 36, 31); color:white;"|29%
|-
|18-19 Mai 2024
|[https://redfieldandwiltonstrategies.com/latest-welsh-westminster-senedd-independence-referendum-voting-intention-18-19-may-2024/ Redfield & Wilton Strategies]
|900
|29%
|style="background: rgb(233, 107, 103); "|59%
|12%
|33% i 67%
|style="background: rgb(220, 36, 31); color:white;"|30%
|-
|23-24 Mawrth 2024
|[https://redfieldandwiltonstrategies.com/latest-welsh-westminster-senedd-independence-referendum-voting-intention-23-24-march-2024/ Redfield & Wilton Strategies]
|878
|30%
|style="background: rgb(233, 107, 103); "|58%
|11%
|34% i 66%
|style="background: rgb(220, 36, 31); color:white;"|32%
|-
|18 Chwefror 2024
|[https://redfieldandwiltonstrategies.com/latest-welsh-westminster-senedd-independence-referendum-voting-intention-18-february-2024/ Redfield & Wilton Strategies]
|874
|27%
|style="background: rgb(233, 107, 103); "|61%
|12%
|31% i 69%
| style="background: rgb(220, 36, 31); color: white;"|34%
|-
|24-26 Ionawr 2024
| [https://redfieldandwiltonstrategies.com/latest-welsh-westminster-senedd-independence-referendum-voting-intention-24-26-january-2024/ Redfield & Wilton Strategies]
|1,100
|30%
|style="background: rgb(233, 107, 103); "|59%
|11%
|34% i 66%
| style="background: rgb(220, 36, 31); color: white;" |29%
|-

|10-11 Rhagfyr 2023
|[https://redfieldandwiltonstrategies.com/latest-welsh-westminster-senedd-independence-referendum-voting-intention-10-11-december-2023/ Redfield & Wilton Strategies]
|1,086
|34%
|style="background: rgb(233, 107, 103); "|58%
|9%
|37% i 63%
| style="background: rgb(220, 36, 31); color: white;" |24%
|-
|12-13 Tachwedd 2023
|[https://redfieldandwiltonstrategies.com/latest-welsh-westminster-senedd-independence-referendum-voting-intention-12-13-november-2023/ Redfield & Wilton Strategies]
|1,100
|33%
| style="background: rgb(233, 107, 103); "|56%
|12%
|37% i 63%
| style="background: rgb(220, 36, 31); color: white;" |23%
|-
|1-6 Medi 2023
|[https://docs.cdn.yougov.com/b15uqz4uy3/YG%20Trackers%20-%20Wales%20-%20Indy%20Ref%20W.pdf YouGov]
|
|22%
| style="background: rgb(233, 107, 103); "|56%
|13%
|28% i 72%
| style="background: rgb(220, 36, 31); color: white;" |34%
|-
|13-14 Awst 2023
|[https://redfieldandwiltonstrategies.com/welsh-westminster-senedd-independence-referendum-voting-intention-13-14-august-2023/ Redfield & Wilton]
[https://redfieldandwiltonstrategies.com/welsh-westminster-senedd-independence-referendum-voting-intention-13-14-august-2023/ Strategies]
|1,068
| style="background: white " |33%
| style="background: rgb(233, 107, 103); "|53%
|14%
|38% i 62%
| style="background: rgb(220, 36, 31); color: white;" |20%
|-
|14–16 Gorffennaf 2023
|[https://redfieldandwiltonstrategies.com/welsh-westminster-senedd-independence-referendum-voting-intention-14-16-july-2023/ Redfield & Wilton Strategies]
|1,050
|32%
|style="background: rgb(233, 107, 103); "|58%
|10%
|36% i 64%
| style="background: rgb(220, 36, 31); color: white;" |26%
|-
|17–18 Mehefin 2023
|[https://redfieldandwiltonstrategies.com/welsh-westminster-senedd-independence-referendum-voting-intention-17-18-june-2023/ Redfield & Wilton Strategies]
|1,000
|30%
|style="background: rgb(233, 107, 103); "|57%
|13%
|34% i 66%
| style="background: rgb(220, 36, 31); color: white;" |27%
|-
|12–17 Mai 2023
|[https://docs.cdn.yougov.com/a25eirhqse/Results_BarnCymru_May2023_VI_W_bpc.pdf YouGov/Barn Cymru]
|1,064
|20%
|style="background: rgb(233, 107, 103); "|54%
|15%
|27% i 73%
| style="background: rgb(220, 36, 31); color: white;" |34%
|-
|14–15 Mai 2023
|[https://redfieldandwiltonstrategies.com/welsh-westminster-senedd-independence-referendum-voting-intention-14-15-may-2023/  Redfield and Wilton Strategies]
|1,058
|32%
|style="background: rgb(233, 107, 103); "|58%
|11%
|36% i 64%
| style="background: rgb(220, 36, 31); color: white;" |26%
|-
|15–17 Ebrill 2023
|[https://redfieldandwiltonstrategies.com/welsh-westminster-senedd-independence-referendum-voting-intention-15-17-april-2023/ Redfield and Wilton Strategies]
|1,251
|29%
|style="background: rgb(233, 107, 103); " |60%
|11%
|33% i 67%
| style="background: rgb(220, 36, 31); color: white;" | 31%
|-
|17–23 Chwefror 2023
|[https://www.walesonline.co.uk/news/politics/growth-support-welsh-independence-hit-26344646 YouGov / WalesOnline]
|1,083
|18%
|style="background: rgb(233, 107, 103); " |55%
|16%
|25% i 75%
| style="background: rgb(220, 36, 31); color: white;" | 37%
|-
|25 Tachwedd – 1 Rhagfyr 2022
|[https://docs.cdn.yougov.com/kq6ro7i7cp/Results_BarnCymru_December2022_W.pdf YouGov / Barn Cymru]
|1,042
| style="background: white " |22%
| style="background: rgb(233, 107, 103); " |55%
|14%
|29% i 71%
| style="background: rgb(220, 36, 31); color: white;" | 33%
|-
|21-25 Tachwedd 2022
|[https://docs.google.com/spreadsheets/d/1--VGWSMjebItM-P_tyQ0JiHGvqUNspsy/edit#gid=184371845 YouGov / YesCymru]
|1,033
| style="background: white " |23%
| style="background: rgb(233, 107, 103); " |54%
|13%
|
| style="background: rgb(220, 36, 31); color: white;" |31%
|-
|20–22 Medi 2022
|[https://docs.cdn.yougov.com/mop3psn7wz/Results_BarnCymru_VI_September2022_W.pdf YouGov / Barn Cymru]
|1,014
| style="background: white " |24%
| style="background: rgb(233, 107, 103); " |52%
|14%
|
| style="background: rgb(220, 36, 31); color: white;" |28%
|-
|16–19 Awst 2022
|[https://docs.cdn.yougov.com/7lxb647ksn/SundayTimes_StateOfTheUnion_220819%20%28Wales%29.pdf YouGov / The Sunday Times]
|1,025
| style="background: white " |25%
| style="background: rgb(233, 107, 103); " |53%
|12%
|
| style="background: rgb(220, 36, 31); color: white;" |28%
|-
|12–16 Mehefin 2022
|[https://nation.cymru/news/welsh-independence-poll/ YouGov / ITV Wales]
|1,020
| style="background: white " |25%
| style="background: rgb(233, 107, 103); " |50%
|25%
|
| style="background: rgb(220, 36, 31); color: white;" |25%
|-
|25 Chwefror – 1 Mawrth 2022
|[https://docs.cdn.yougov.com/ej0sztvk69/Results_BarnCymru_FebMarch2022_W.pdf YouGov/ Barn Cymru]
|1,086
| style="background: white " |21%
| style="background: rgb(233, 107, 103); " |53%
|26%
|
| style="background: rgb(220, 36, 31); color: white;" |32%
|-
|5 Mai 2021
|[https://2sjjwunnql41ia7ki31qqub1-wpengine.netdna-ssl.com/wp-content/uploads/2021/05/Final_38028217-Wales-Poll-20210505_Private.pdf Savanta ComRes] {{Webarchive|url=https://web.archive.org/web/20220216174817/https://2sjjwunnql41ia7ki31qqub1-wpengine.netdna-ssl.com/wp-content/uploads/2021/05/Final_38028217-Wales-Poll-20210505_Private.pdf |date=2022-02-16 }}
|1,002
| style="background: white " |30%
| style="background: rgb(233, 107, 103); " |55%
|15%
|
| style="background: rgb(220, 36, 31); color: white;" |25%
|-
|2-4 Mai 2021
|[https://docs.cdn.yougov.com/6guq1ce7rg/Results_WelshBarometer_May2021.pdf YouGov / Welsh Barometer]
|1,071
| style="background: white " |21%
| style="background: rgb(233, 107, 103); " |55%
|14%
|
| style="background: rgb(220, 36, 31); color: white;" |34%
|-
|29 Ebrill – 4 Mai 2021
|[https://2sjjwunnql41ia7ki31qqub1-wpengine.netdna-ssl.com/wp-content/uploads/2021/05/Final_38028217-Wales-Poll-20210505_Private.pdf Savanta ComRes] {{Webarchive|url=https://web.archive.org/web/20220216174817/https://2sjjwunnql41ia7ki31qqub1-wpengine.netdna-ssl.com/wp-content/uploads/2021/05/Final_38028217-Wales-Poll-20210505_Private.pdf |date=2022-02-16 }}
|1,002
| style="background: white " |27%
| style="background: rgb(233, 107, 103); " |58%
|14%
|
| style="background: rgb(220, 36, 31); color: white;" |31%
|-
|23–28 Ebrilll 2021
|[https://2sjjwunnql41ia7ki31qqub1-wpengine.netdna-ssl.com/wp-content/uploads/2021/04/Final_38028217-Wales-Poll-20210429_Private.pdf Savanta ComRes] {{Webarchive|url=https://web.archive.org/web/20211204033541/https://2sjjwunnql41ia7ki31qqub1-wpengine.netdna-ssl.com/wp-content/uploads/2021/04/Final_38028217-Wales-Poll-20210429_Private.pdf |date=2021-12-04 }}
|1,002
| style="background: white " |42%
| style="background: rgb(248, 193, 190); " |49%
|8%
|
| style="background: rgb(220, 36, 31); color: white;" |7%
|-
|18–21 Ebrill 2021
|[https://docs.cdn.yougov.com/sxfuel0axy/Results_WelshBarometer_April2021.pdf YouGov]
|1,142
| style="background: white " |22%
| style="background: rgb(233, 107, 103); " |54%
|24%
|
| style="background: rgb(220, 36, 31); color: white;" |32%
|-
|9–19 Ebrill 2021
|[https://www.opinium.com/resource-center/uk-scottish-parliament-voting-intention-1-april-2021-2/ Opinium / Sky News]
|2,005
| style="background: white " |28%
| style="background: rgb(233, 107, 103); " |52%
|19%
|
| style="background: rgb(220, 36, 31); color: white;" |24%
|-
|16–19 Mawrth 2021
|[https://docs.cdn.yougov.com/664i42ptww/Results_WelshBarometer_March2021.pdf Welsh Barometer Survey / YouGov]
|1,174
| style="background: white " |22%
| style="background: rgb(233, 107, 103); " |55%
|23%
|
| style="background: rgb(220, 36, 31); color: white;" |33%
|-
|18–22 Chwefror 2021
|[https://2sjjwunnql41ia7ki31qqub1-wpengine.netdna-ssl.com/wp-content/uploads/2021/03/Final_p011076_Wales.pdf Savanta ComRes / ITV News]{{Dolen marw|date=February 2023 |bot=InternetArchiveBot |fix-attempted=yes }}
|1,003
| style="background: white " |35%
| style="background: rgb(233, 107, 103); " |55%
|10%
|
| style="background: rgb(220, 36, 31); color: white;" |20%
|-
|19–22 Chwefror 2021
|[https://docs.cdn.yougov.com/dwrw75v5px/WalesOnline_WalesResults_210222_w.pdf WalesOnline / YouGov]
|1,059
| style="background: white " |25%
| style="background: rgb(233, 107, 103); " |50%
|14%
|
| style="background: rgb(220, 36, 31); color: white;" |25%
|-
|18–21 Ionawr 2021
|[https://docs.cdn.yougov.com/nh08mh24pk/SundayTimesResults_210121_StateoftheUnion_W.pdf The Sunday Times / YouGov]
|1,059
| style="background: white " |23%
| style="background: rgb(233, 107, 103); " |52%
|25%
|
| style="background: rgb(220, 36, 31); color: white;" |29%
|-
|11–14 Ionawr 2021
|[https://docs.cdn.yougov.com/soez6mmnci/Results_WelshBarometer_January2021_W.pdf Welsh Barometer Survey / YouGov]
|1,018
| style="background: white " |22%
| style="background: rgb(233, 107, 103); " |53%
|25%
|29% i 71%
| style="background: rgb(220, 36, 31); color: white;" |31%
|-
|26–29 Hydref 2020
|[https://docs.cdn.yougov.com/lvbjz3q4w9/Results_WelshBarometer_October2020_W.pdf Welsh Barometer Survey / YouGov]
|1,013
| style="background: white " |23%
| style="background: rgb(233, 107, 103); " |53%
|25%
|30% i 70%
| style="background: rgb(220, 36, 31); color: white;" |30%
|-
|24–27 Awst 2020
|[https://d3n8a8pro7vhmx.cloudfront.net/yescymru/mailings/1578/attachments/original/YesCymru_WelshIndyPolling_200827_indy.pdf?1599067616 YesCymru / YouGov]
|1,044
| style="background: white " |25%
| style="background: rgb(233, 107, 103); " |52%
|23%
|32% i 68%
| style="background: rgb(220, 36, 31); color: white;" |27%
|-
|29 Gorffennaf – 7 Awst 2020
|[https://d3n8a8pro7vhmx.cloudfront.net/yescymru/mailings/1551/attachments/original/YouGov_Data_for_YesCymru_August_2020.pdf?1598357448 YesCymru / YouGov]
|1,044
| style="background: white " |26%
| style="background: rgb(233, 107, 103); " |55%
|19%
|32% i 68%
| style="background: rgb(220, 36, 31); color: white;" |29%
|-
|29 Mai – 1 Mehefin 2020
|[https://docs.cdn.yougov.com/6a5jrgxa0c/Results_WelshBarometer_MayJune2020_W.pdf ITV Wales / YouGov / Cardiff Uni]
|1,021
| style="background: white " |25%
| style="background: rgb(233, 107, 103); " |54%
|21%
|32% i 68%
| style="background: rgb(220, 36, 31); color: white;" |29%
|-
|20–26 Ionawr 2020
|[https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/83k4ahu8lh/Results_WelshBarometer_January2020_16%2B_W.pdf Welsh Barometer Survey / YouGov]
|1,037
| style="background: white " |21%
| style="background: rgb(233, 107, 103); " |57%
|22%
|27% i 73%
| style="background: rgb(220, 36, 31); color: white;" |36%
|-
|6–9 Rhagfyr 2019
|[https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/6wb9pejrqd/Results_WelshBarometer_December19_FinalDelivery.pdf Welsh Barometer Survey / YouGov]
|1,020
| style="background: white " |17%
| style="background: rgb(233, 107, 103); " |60%
|23%
|22% i 78%
| style="background: rgb(220, 36, 31); color: white;" |43%
|-
|22–25 Tachwedd 2019
|[https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/veg76j0zmo/Results_WelshBarometer_November19_FinalDelivery_w.pdf Welsh Barometer Survey / YouGov]
|1,116
| style="background: white " |20%
| style="background: rgb(233, 107, 103); " |57%
|22%
|26% i 74%
| style="background: rgb(220, 36, 31); color: white;" |37%
|-
|31 Hydref – 4 Tachwedd 2019
|[https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/6d2mscmgxy/Results_WelshBarometer_November2019_1_w.pdf Welsh Barometer Survey / YouGov]
|1,032
| style="background: white " |22%
| style="background: rgb(233, 107, 103); " |57%
|21%
|28% i 72%
| style="background: rgb(220, 36, 31); color: white;" |35%
|-
|10–14 Hydref 2019
|[https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/m1aqst74bd/Results_WelshBarometer_October2019_w.pdf Welsh Barometer Survey / YouGov]
|1,032
| style="background: white " |21%
| style="background: rgb(233, 107, 103); " |57%
|23%
|27% i 73%
| style="background: rgb(220, 36, 31); color: white;" |36%
|-
|6–10 Medi 2019
|[https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/4lav01m6zl/PlaidCymruResults_190910_Independence_W.pdf Plaid Cymru / YouGov]
|1,039
| style="background: white " |24%
| style="background: rgb(233, 107, 103); " |52%
|23%
|32% i 68%
| style="background: rgb(220, 36, 31); color: white;" |28%
|-
|7–14 Rhagfyr 2018
|[http://blogs.cardiff.ac.uk/electionsinwales/wp-content/uploads/sites/100/2018/12/WALES_DEVO_TABS_1218.pdf Sky News Data: Wales]
|1,014
| style="background: white " |17%
| style="background: rgb(233, 107, 103); " |67%
|16%
|20% i 80%
| style="background: rgb(220, 36, 31); color: white;" |50%
|-
|30 May – 6 Mehefin 2018
|[https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/ux4c6rw4bx/FOE_Wales_June18_Results_w.pdf YouGov]
|2,016
| style="background: white " |19%
| style="background: rgb(233, 107, 103); " |65%
|16%
|23% i 77%
| style="background: rgb(220, 36, 31); color: white;" |46%
|-
|Gorffennaf 2016
|[http://blogs.cardiff.ac.uk/electionsinwales/2016/07/05/the-eu-referendum-afterthoughts-and-consequences/ ITV Wales / YouGov] {{Webarchive|url=https://web.archive.org/web/20200814175626/http://blogs.cardiff.ac.uk/electionsinwales/2016/07/05/the-eu-referendum-afterthoughts-and-consequences/ |date=2020-08-14 }}
|1,010
| style="background: white " |15%
| style="background: rgb(233, 107, 103); " |65%
|20%
|19% i 81%
| style="background: rgb(220, 36, 31); color: white;" |50%
|-
|8–11 Medi 2014
|[http://www.walesonline.co.uk/news/wales-news/support-welsh-independence-boosted-scottish-7773741 ITV Wales / YouGov / Cardiff University]
|>1,000
| style="background: white " |17%
| style="background: rgb(233, 107, 103); " |70%
|13%
|20% i 80%
| style="background: rgb(220, 36, 31); color: white;" |53%
|-
|Ebrill 2014
|[http://www.walesonline.co.uk/news/wales-news/wales-says-no-scottish-independence-7007185 YouGov]
|1,000
| style="background: white " |12%
| style="background: rgb(233, 107, 103); " |74%
|14%
|14% i 86%
| style="background: rgb(220, 36, 31); color: white;" |62%
|}

== Cwestiynnau â chyd-destun (ansafonnol) ==
{| class="wikitable sortable" style="text-align:center;font-size:95%;"
! rowspan="2" |Dyddiad
! rowspan="2" |Trefnwr
! rowspan="2" |Maint sampl
! colspan="3" |A ddylai Cymru fod yn wlad annibynnol?
! rowspan="2" |Eithrio ddim yn gwybod
! rowspan="2" |Arwain
! rowspan="2" |Nodiadau
|-
!Ie
!Na
!Di-benderfyniad
|-
|6–10 Medi 2019
|Plaid Cymru / YouGov
|1,039
|33%
| style="background: rgb(233, 107, 103); " |48%
|20%
|41% i 59%
| style="background: rgb(220, 36, 31); color: white;" |15%
|<br />Os fyddai Cymru annibynnol yn aeold o'r Undeb Ewropeaidd
|-
|Gorffennaf 2016
|[http://blogs.cardiff.ac.uk/electionsinwales/2016/07/05/the-eu-referendum-afterthoughts-and-consequences/ ITV Wales / YouGov] {{Webarchive|url=https://web.archive.org/web/20200814175626/http://blogs.cardiff.ac.uk/electionsinwales/2016/07/05/the-eu-referendum-afterthoughts-and-consequences/ |date=2020-08-14 }}
|1,010
|28%
| style="background: rgb(233, 107, 103); " |53%
|20%
|35% i 65%
| style="background: rgb(220, 36, 31); color: white;" |25%
|<br />Os fyddai Cymru annibynnol yn aeold o'r Undeb Ewropeaidd
|-
|Gorffennaf 2016
|[http://blogs.cardiff.ac.uk/electionsinwales/2016/07/05/the-eu-referendum-afterthoughts-and-consequences/2040972 ITV Wales / YouGov] {{Webarchive|url=https://web.archive.org/web/20190806002843/http://blogs.cardiff.ac.uk/electionsinwales/2016/07/05/the-eu-referendum-afterthoughts-and-consequences/2040972 |date=2019-08-06 }}
|1,010
|19%
| style="background: rgb(233, 107, 103); " |61%
|21%
|24% i 76%
| style="background: rgb(220, 36, 31); color: white;" |42%
|Os yw'r Alban yn gadel y DU
|-
|Mawrth 2013
|[http://www.walesonline.co.uk/news/wales-news/voters-would-say-no-independent-2040972 ITV Wales / YouGov]
|Unknown
|10%
| style="background: rgb(233, 107, 103); " |62%
|28%
|14% i 86%
| style="background: rgb(220, 36, 31); color: white;" |52%
|Os yw'r Alban yn gadel y DU
|}

== Oedran ==
Fe wnaeth arolwg barn garn Redfield and Wilton ofyn y cwestiwn canlynol ym mis Rhagfyr 2023, "Pe bai refferendwm yfory gyda’r cwestiwn canlynol, sut fyddech chi’n pleidleisio? A ddylai Cymru fod yn wlad annibynnol?". Mae'r ffigyrau yn cynnwys tebygolrywdd o bleidleisio ac yn eithrio "ddim yn gwybod".<ref name=":0">{{Cite web|title=Latest Welsh Westminster, Senedd & Independence Referendum Voting Intention (10-11 December 2023)|url=https://redfieldandwiltonstrategies.com/latest-welsh-westminster-senedd-independence-referendum-voting-intention-10-11-december-2023/|website=Redfield & Wilton Strategies|date=2023-12-13|access-date=2023-12-13|language=en-GB|first=Redfield & Wilton|last=Strategies}}</ref><ref name=":1" /> Addaswyd ffigyrau YouGov i i dynnu y rhai nad oddent yn gwybod.

=== Redfield & Wilton ===
{| class="wikitable"
|Mai 2024<ref>{{Cite web|title=Latest Welsh Westminster, Senedd & Independence Referendum Voting Intention (18-19 May 2024)|url=https://redfieldandwiltonstrategies.com/latest-welsh-westminster-senedd-independence-referendum-voting-intention-18-19-may-2024/|website=Redfield & Wilton Strategies|date=2024-05-22|access-date=2024-05-22|language=en-GB}}</ref>
|'''16-24'''
|'''25-34'''
|'''35-44'''
|'''45-54'''
|'''55-64'''
|'''65+'''
|-
|'''Ie'''
|36%
|{{yes|52%}}
|46%
|37%
|30%
|18%
|-
|'''Na'''
|{{no|64%}}
|48%
|{{no|54%}}
|{{no|63%}}
|{{no|70%}}
|{{no|82%}}
|}
{| class="wikitable"
|Mawrth 2024<ref>{{Cite web|title=Latest Welsh Westminster, Senedd & Independence Referendum Voting Intention (23-24 March 2024)|url=https://redfieldandwiltonstrategies.com/latest-welsh-westminster-senedd-independence-referendum-voting-intention-23-24-march-2024/|website=Redfield & Wilton Strategies|date=2024-03-27|access-date=2024-03-28|language=en-GB|first=Redfield & Wilton|last=Strategies}}</ref>
|'''16-24'''
|'''25-34'''
|'''35-44'''
|'''45-54'''
|'''55-64'''
|'''65+'''
|-
|'''Ie'''
|40%
|44%
|{{yes|52%}}
|29%
|22%
|29%
|-
|'''Na'''
|{{no|60%}}
|{{no|56%}}
|48%
|{{no|71%}}
|{{no|78%}}
|{{no|71%}}
|}
{| class="wikitable"
|Chwefror 2023<ref>{{Cite web|title=Latest Welsh Westminster, Senedd & Independence Referendum Voting Intention (18 February 2024)|url=https://redfieldandwiltonstrategies.com/latest-welsh-westminster-senedd-independence-referendum-voting-intention-18-february-2024/|website=Redfield & Wilton Strategies|date=2024-02-21|access-date=2024-03-28|language=en-GB|first=Redfield & Wilton|last=Strategies}}</ref>
|'''16-24'''
|'''25-34'''
|'''35-44'''
|'''45-54'''
|'''55-64'''
|'''65+'''
|-
|'''Ie'''
|46%
|42%
|{{yes|54%}}
|22%
|29%
|13%
|-
|'''Na'''
|{{no|54%}}
|{{no|58%}}
|46%
|{{no|78%}}
|{{no|71%}}
|{{no|87%}}
|}
{| class="wikitable"
|Ionawr 2024<ref>{{Cite web|title=Latest Welsh Westminster, Senedd & Independence Referendum Voting Intention (24-26 January 2024)|url=https://redfieldandwiltonstrategies.com/latest-welsh-westminster-senedd-independence-referendum-voting-intention-24-26-january-2024/|website=Redfield & Wilton Strategies|date=2024-01-30|access-date=2024-01-30|language=en-GB|first=Redfield & Wilton|last=Strategies}}</ref>
|'''16-24'''
|'''25-34'''
|'''35-44'''
|'''45-54'''
|'''55-64'''
|'''65+'''
|-
|'''Ie'''
|{{yes|59%}}
|{{yes|53%}}
|47%
|29%
|28%
|16%
|-
|'''Na'''
|41%
|47%
| style="background: rgb(248, 193, 190); "|53%
|{{No|71%}}
|{{No|72%}}
|{{No|84%}}
|}
{| class="wikitable"
|Rhagfyr 2023<ref name=":0" />
|'''16-24'''
|'''25-34'''
|'''35-44'''
|'''45-54'''
|'''55-64'''
|'''65+'''
|-
|'''Ie'''
|{{yes|55%}}
|{{Yes|59%}}
|48%
|27%
|33%
|21%
|-
|'''Na'''
|45%
|41%
| style="background: rgb(248, 193, 190); " |52%
|{{no|73%}}
|{{no|67%}}
|{{no|79%}}
|}
{| class="wikitable"
|Awst 2023<ref name=":1">{{Cite web|title=Welsh Westminster, Senedd & Independence Referendum Voting Intention (13-14 August 2023)|url=https://redfieldandwiltonstrategies.com/welsh-westminster-senedd-independence-referendum-voting-intention-13-14-august-2023/|website=Redfield & Wilton Strategies|date=2023-08-16|access-date=2023-12-13|language=en-GB|first=Redfield & Wilton|last=Strategies}}</ref>
|'''18-24'''
|'''25-34'''
|'''35-44'''
|'''45-54'''
|'''55-64'''
|'''65+'''
|-
|'''Ie'''
|{{yes|58%}}
|{{yes|60%}}
|45%
|28%
|34%
|29%
|-
|'''Na'''
|42%
|40%
| style="background: rgb(248, 193, 190); " |55%
|{{no|72%}}
|{{no|66%}}
|{{no|71%}}
|}
{| class="wikitable"
|Ebrill 2023<ref>{{Cite web|title=Welsh Westminster, Senedd & Independence Referendum Voting Intention (15-17 April 2023)|url=https://redfieldandwiltonstrategies.com/welsh-westminster-senedd-independence-referendum-voting-intention-15-17-april-2023/|website=Redfield & Wilton Strategies|date=2023-04-20|access-date=2023-12-13|language=en-GB|first=Redfield & Wilton|last=Strategies}}</ref>
|'''16-17'''
|'''18-24'''
|'''25-34'''
|'''35-44'''
|'''45-54'''
|'''55-64'''
|'''65+'''
|-
|'''Ie'''
|46%
|42%
|45%
|44%
|29%
|24%
|20%
|-
|'''Na'''
| style="background: rgb(248, 193, 190); " |54%
|{{no|58%}}
| style="background: rgb(248, 193, 190); " |55%
|{{no|56%}}
|{{no|71%}}
|{{no|76%}}
|{{no|80%}}
|}

=== YouGov ===
{| class="wikitable"
|Medi 2023<ref name=":0" />
|'''16-24'''
|'''25-49'''
|'''50-64'''
|'''65+'''
|-
|'''Ie'''
|45%
|33%
|25%
|19%
|-
|'''Na'''
| style="background: rgb(248, 193, 190); " |55%
|{{no|67%}}
|{{no|75%}}
|{{no|81%}}
|}
{| class="wikitable"
|Mai/Mehefin 2018<ref>{{Cite web|url=https://d25d2506sfb94s.cloudfront.net/cumulus_uploads/document/ux4c6rw4bx/FOE_Wales_June18_Results_w.pdf|title=YouGov / Future of England Survey Results}}</ref>
|'''18-24'''
|'''25-49'''
|'''50-64'''
|'''65+'''
|-
|'''Ie'''
|29%
|31%
|21%
|17%
|-
|'''Na'''
| style="background: rgb(248, 193, 190); " |71%
|{{no|69%}}
|{{no|79%}}
|{{no|83%}}
|}

== Arolygon annibyniaeth "0-10" ==
Gofynnwyd i ymatebwyr roi sgôr o 0–10. 0–4 Yn erbyn, 5 difater, 6–10 O Blaid. Dileu "Ddim yn Gwybod".
{| class="wikitable sortable"
! rowspan="2" |Dyddiad
! rowspan="2" | Cwmni
! rowspan="2" | Sampl
! rowspan="2" | Cyfanswm ffafriol
! colspan="5" | O blaid
! Difater
! colspan="5" | Yn erbyn
! rowspan="2" | Cyfanswm anffafriol
|-
! 10
! 9
! 8
! 7
! 6
! 5
! 4
! 3
! 2
! 1
! 0
|-
| 10–15 Mai 2019
| [https://nation.cymru/opinion/indycurious-and-curiouser-new-poll-shows-support-for-welsh-independence-on-the-rise/ YesCymru / YouGov]
| 1,133
| style="background: white" | 36%
| 14%
| 4%
| 5%
| 6%
| 7%
| 17%
| 5%
| 6%
| 6%
| 2%
| 28%
| style="background: rgb(248, 193, 190);" | 47%
|-
| 9–12 Mai 2017
| [http://blogs.cardiff.ac.uk/electionsinwales/2017/05/30/new-polling-on-welsh-independence/ YesCymru / YouGov] {{Webarchive|url=https://web.archive.org/web/20180401070829/http://blogs.cardiff.ac.uk/electionsinwales/2017/05/30/new-polling-on-welsh-independence/ |date=2018-04-01 }}
| 1,000
| style="background: white" | 29%
| 10%
| 2%
| 6%
| 6%
| 5%
| 18%
| 4%
| 6%
| 7%
| 5%
| 31%
| style="background: rgb(233, 107, 103);" | 53%
|}

== Arolygon annibynniaeth a datganoli ==
{| class="wikitable sortable" style="text-align:center;font-size:95%;"
! style="background:#efefef;" |Dyddiad
! Cwmni
! style="background:green; color:white;" | Cefnogi<br />annibyniaeth (%)
! style="background:green; color:white;" | Cefnogi mwy o bwerau i'r Senedd (%)
! style="background:orange; color:white;" | Cefnogi status quo (%)
! style="background:red; color:white;" | Cefnogi llai o bwerau i'r Senedd (%)
! style="background:red; color:white;" | Cefnogi diddymu y Senedd (%)
! style="background:black; color:white;" | Difater/dim ateb/Arall (%)
|-
| 28 Ionawr – 21 Chwefror 2021<ref>{{Cite web|date=28 February 2021|title=Voting attitudes and Senedd powers quizzed in poll for BBC Wales|url=https://www.bbc.co.uk/news/uk-wales-politics-56194878|publisher=BBC News|access-date=28 February 2021}}</ref>
| BBC / ICM Unlimited
| 14
| style="background: rgb(153, 255, 153);" | 35
| 27
| 3
| 15
| 6
|-
| 29 Mai – 1 Mehefin 2020<ref>{{Cite web|last=Awan-Scully|first=Roger|date=5 June 2020|title=Attitudes to Devolution and Welsh Independence|url=https://blogs.cardiff.ac.uk/electionsinwales/2020/06/05/attitudes-to-devolution-and-welsh-independence/|access-date=5 June 2020|website=Cardiff University|language=en-GB|archive-date=2020-09-04|archive-url=https://web.archive.org/web/20200904164221/https://blogs.cardiff.ac.uk/electionsinwales/2020/06/05/attitudes-to-devolution-and-welsh-independence/|url-status=dead}}</ref>
| ITV Cymru a Phrifysgol Caerdydd / YouGov
| 16
| 20
| style="background: rgb(255, 219, 153);" | 24
| 5
| 22
| 14
|-
| 4–22 Chwefror 2020<ref>{{Cite web|date=1 March 2020|title=St Davids Day Poll 2020|url=https://www.icmunlimited.com/our-work/bbc-wales-st-davids-day-poll-2020/}}</ref>
| BBC / ICM
| 11
| style="background: rgb(153, 255, 153);" | 43
| 25
| 2
| 14
| 3
|-
| 7–23 Chwefror 2019<ref>{{Cite news|date=1 March 2019|title=Attitudes to Brexit and economy polled|work=BBC News|url=https://www.bbc.com/news/uk-wales-politics-47394303}}</ref>
| BBC / ICM
| 7
| style="background: rgb(153, 255, 153);" | 46
| 27
| 3
| 13
| 4
|-
| Rhagfyr 2018<ref>{{Cite web|last=Awan-Scully|first=Roger|date=20 December 2018|title=Does Wales Want to Abolish the Assembly?|url=http://blogs.cardiff.ac.uk/electionsinwales/2018/12/20/does-wales-want-to-abolish-the-assembly/|publisher=Cardiff University|access-date=2023-01-09|archive-date=2021-05-15|archive-url=https://web.archive.org/web/20210515134902/https://blogs.cardiff.ac.uk/electionsinwales/2018/12/20/does-wales-want-to-abolish-the-assembly/|url-status=dead}}</ref>
| SkyData
| 8
| style="background: rgb(153, 255, 153);" | 40
| 23
| 4
| 18
| 7
|-
| Chwefror 2017 <ref name="EU migrants should have skills, public tells BBC Wales poll">{{Cite news|date=2017-03-01|title=EU migrants should have skills, public tells BBC Wales poll|publisher=BBC News|url=https://www.bbc.co.uk/news/uk-wales-politics-39114914}}</ref>
| BBC / ICM
| 6
| style="background: rgb(153, 255, 153);" | 44
| 29
| 3
| 13
| 4
|-
| Chwefror 2016<ref>{{Cite web|date=1 March 2016|title=St David's Day Poll|url=https://www.icmunlimited.com/wp-content/uploads/2016/05/BBC-St.-Davids-Day-Poll_March-2016.pdf|access-date=2019-08-11|website=blogs.cardiff.ac.uk}}</ref>
| BBC / ICM
| 6
| style="background: rgb(153, 255, 153);" | 43
| 30
| 3
| 13
| 4
|-
| Chwefror 2015<ref>{{Cite web|date=2016|title=ICM Poll for the BBC|url=https://www.icmunlimited.com/wp-content/uploads/2016/03/2015_bbcwales_march_poll.pdf|access-date=2019-08-11|website=www.icmunlimited.com}}</ref>
| BBC / ICM
| 6
| style="background: rgb(153, 255, 153);" | 40
| 33
| 4
| 13
| 4
|-
| Medi 2014 <ref name="'Record low' back Welsh independence - BBC/ICM poll">{{Cite news|date=2014-09-15|title='Record low' back Welsh independence - BBC/ICM poll|publisher=Wales Online|url=https://www.bbc.co.uk/news/uk-wales-29331475/|access-date=2014-09-19}}</ref>
| BBC / ICM
| 3
| style="background: rgb(153, 255, 153);" | 49
| 26
| 2
| 12
| 6
|-
| Chwefror 2014 <ref name="BBC Cymru ICM Poll of 1,000 adults">{{Cite news|title=BBC Cymru Wales poll: Few in Wales back Scottish independence|date=28 February 2014|publisher=BBC News|url=https://www.bbc.co.uk/news/uk-wales-26378274|access-date=6 April 2014}}</ref>
| BBC / ICM
| 5
| style="background: rgb(153, 255, 153);" | 37
| 28
| 3
| 23
| 5
|-
| 2013 <ref name=":6">{{Cite web|title=Historical Polls|url=https://www.icmunlimited.com/historical-polls/|access-date=2022-06-24|website=icmunlimited}}</ref>
| BBC / ICM
| 9
| 36
| 28
| 2
| 20
| 4
|-
| 2012 <ref name=":6" />
| BBC / ICM
| 7
| 36
| 29
| 2
| 22
| 4
|-
| 2011 <ref name=":6" />
| BBC / ICM
| 11
| 35
| 18
| 17
| 15
| 4
|-
| 2010 <ref name=":6" />
| BBC / ICM
| 11
| 40
| 13
| 18
| 13
| 4
|}

== Annibyniaeth vs Dim datganoli ==
{| class="wikitable"
! rowspan="2" |Dyddiad
! rowspan="2" | Cwmni
! rowspan="2" | Sampl
! colspan="5" | Annibyniaeth<br />(gan gynnwys is-samplau)
! colspan="5" | Dim llywodraeth ddatganoledig<br />(gan gynnwys is-samplau)
! rowspan="2" | Difater / dim ateb ''(%)''
|-
! Cyfanswm (%)
! ''Ceidwadwyr'' ''(%)''
! ''Llafur'' ''(%)''
! ''Democratiaid Rhyddfrydol'' ''(%)''
! ''Plaid Cymru'' ''(%)''
! Cyfanswm (%)
! ''Ceidwadwyr (%)''
! ''Llafur (%)''
! ''Democratiaid Rhyddfrydol (%)''
! ''Plaid Cymru (%)''
|-
| 29 Mai – 1 Mehefin 2020
| [https://blogs.cardiff.ac.uk/electionsinwales/2020/06/05/attitudes-to-devolution-and-welsh-independence/ ITV Cymru / YouGov / Prifysgol Caerdydd] {{Webarchive|url=https://web.archive.org/web/20200904164221/https://blogs.cardiff.ac.uk/electionsinwales/2020/06/05/attitudes-to-devolution-and-welsh-independence/ |date=2020-09-04 }}
| 1,021
| style="background: white" | 33%
| 12%
| style="background: rgb(153, 255, 153);" | 45%
| 39%
| style="background: rgb(1,223,116);" | 87%
| style="background: rgb(248, 193, 190);" | 45%
| style="background: rgb(233, 107, 103);" | 79%
| 35%
| style="background: rgb(233, 107, 103);" | 53%
| 4%
| 21%
|}

== Gweler hefyd ==

=== Arolygon barn ===

* [[Etholiad nesaf Senedd Cymru]]
* [[Etholiad cyffredinol nesaf y Deyrnas Unedig yng Nghymru]]

=== Cymru ===
* [[Teitl Tywysog Cymru|Ymgyrch i ddod â theitl Tywysog Cymru i ben]]

* [[Datganoli Cymru]]
* [[Annibyniaeth i Gymru]]
* [[Mudiad gweriniaethol Cymru]]
* [[Rhestr o Gymry a wrthododd "Anrhydedd Brydeinig"]]
* [[Rhestr mudiadau Cymru]]
* [[Gwleidyddiaeth Cymru]]

=== Gwledydd eraill ===

* [[Annibyniaeth yr Alban]]
* [[Arolygon barn ar annibyniaeth yr Alban]]
* [[Iwerddon unedig]]
* [[Arolygon barn ar Iwerddon Unedig]]
* [[Llydaw Unedig]]
* [[Datganoli Cernyw]]

== Cyfeiriadau ==
<references />
{{Datganoli Cymru}}{{Economi Cymru}}{{Cymru}}{{Y Gwledydd Celtaidd}}
[[Categori:Mudiadau gwleidyddol Cymru]]
[[Categori:Cenedlaetholdeb Cymreig]]
[[Categori:Gwleidyddiaeth Cymru]]
[[Categori:Cenedlaetholdeb Celtaidd]]