# Arolygon barn ar Iwerddon Unedig

Dyma restr o **arolygon barn ar Iwerddon Unedig** (o bobl gogledd Iwerddon) a elwir weithiau yn **Iwerddon Newydd**.

Iwerddon

## Arolygon barn

| Dyddiad
 | Cwmni
 | Sampl
 | Ie
 | Na
 | Heb benderfynu
 | Ddim am bleidleisio
 | Arwain
 |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 14-17 Chwefror 2025
 | LucidTalk/Belfast Telegraph
 | 1,050
 | 41%
 | 48%
 | 10%
 | 1%
 | 7%
 |  |
| 6 Medi - 19 Tachwedd 2024
 | Northern Ireland Life and Times Survey 2024
 | 1,199
 | 36%
 | 42%
 | 11%
 | 5%
 | 6%
 |
| Awst-Medi 2024
 | ARINS/Irish Times
 | 1,000
 | 34%
 | 48%
 | 14%
 |  | 15%
 |  |
| 19 Gorffennaf-27 Awst 2024
 | Social Market Research Belfast
 | 2,034
 | 33.7%
 | 48.6%
 | 14%
 | 3.7%
 | 14.9%
 |  |
| 9-12 Chwefror 2024
 | LucidTalk
 | 3,207
 | 39%
 | 49%
 | 11%
 | 1%
 | 10%
 |  |
| Tachwedd 2023
 | ARINS/ The Irish Times
 | 1,019
 | 30%
 | 51%
 | 15%
 | 5%
 | 21%
 |  |
| 26 Hydref - 3 Tachwedd 2023
 | The Institute of Irish Studies/Social Market Research
 | 1,074
 | 31% | 49%
 | 9%
 | N/A | 18%
 |  |
| 17-30 Mehefin 2023
 | The Institute of Irish Studies/Social Market Research
 | 1,017
 | 36.1%
 | 47.0%
 | 10%
 | 6.2%
 | 10.9%
 |  |
| 5 Medi – 20 Tachwedd 2022
 | Northern Ireland Life and Times Survey
 | 1,405
 | 35% | 47%
 | 10%
 | 4% | 12%
 |  |
| 17 Awst 2022 – 15 Hydref 2022
 | ARINS/The Irish Times
 | 1,009
 | 27% | 50%
 | 23% | 23%
 |  |
| Awst 2022
 | LucidTalk
 | 3,384
 | 41% | 48%
 | 11%
 | 7%
 |  |
| 11-26 Mawrth 2022
 | University of Liverpool/The Irish News
 | 1,000
 | 30.0% | 45.3%
 | \*18.7%
 | 6% | 15.3%
 |  |
| 15-18 Tachwedd 2021
 | Lord Ashcroft
 | 3,301
 | 41% | 49%
 | 8% | 8%
 |  |
| Hydref-Rhagfyr 2021
 | Life & Times
 | 1,397
 | 34% | 48%
 | 11%
 | 4% | 14%
 |  |
| Hydref 2021
 | University of Liverpool
 | 1,002
 | 29.8% | 58.6%
 | 9.1%
 | 2.5% | 28.8%
 |  |
| 20-23 Awst 2021
 | LucidTalk
 | 2,403
 | 42% | 49%
 | 9%
 | 0% | 7%
 |  |
| Mehefin 2021
 | Life & Times
 |  | 30% | 53%
 | 9%
 | 5% | 23%
 |  |
| Mai 2021
 | *Belfast Telegraph*/Kantar
 |  | 35% | 44%
 | 21% | 9%
 |  |
| Ebrill 2021
 | LucidTalk
 |  | 43% | 49%
 | 8% | 6%
 |  |
| Chwefror 2021
 | Savanta ComRes/ITV News
 |  | 36% | 49%
 | 15% | 13%
 |  |
| Ionawr 2021
 | Lucid Talk/The Sunday Times
 |  | 42.3% | 46.8%
 | 10.7% | 4.5%
 |  |
| Cyfnod trawsnewid *Brexit* yn gorffen a'r Deyrnas Gyfunol yn gadael yr Undeb Ewropeaidd, 31 Rhagfyr 2020
 |  |
| Chwefror 2020
 | LucidTalk
 |  | 45% | 47%
 | 8% | 2%
 |  |
| Chwefror 2020
 | Liverpool University
 |  | 29% | 52%
 | 19% | 23%
 |  |
| Medi 2019
 | Lord Ashcroft
 | 1,542 | 46%
 | 45%
 | 9% | 1%
 |  |
| Mawrth 2019
 | *Irish Times*/Ipsos Mori
 |  | 32% | 45%
 | 23% | 13%
 |  |
| Mehefin 2018
 | Lord Ashcroft
 |  | 44% | 49%
 | 7% | 5%
 |  |
| Mehefin 2018
 | NILT
 |  | 22% | 55%
 | 10%
 | 12% | 33%
 |  |
| Mai 2018
 | LucidTalk/YouGov/BBC
 |  | 42% | 45%
 | 12.7%
 | 0.2% | 3%
 |  |
| Mai 2018
 | ICM
 |  | 21% | 50%
 | 18.9%
 | 9.7% | 29%
 |  |
| Hydref 2017
 | LucidTalk
 |  | 34% | 55%
 | 9.8%
 | 1.1% | 21%
 |  |
| Gorffennaf 2017
 | ESRC
 |  | 27% | 52%
 | 21% | 25%
 |  |
| Awst 2016
 | Ipsos Mori
 |  | 22%
 | 63%
 | 13%
 | 2%
 | 41%
 |  |
| Refferendwm y Deyrnas Gyfunol ar adael yr Undeb Ewropeaidd, 23 Mehefin 2016
 |  |
| Refferendwm annibyniaeth yr Alban, 18 Medi 2014
 |  |
| Ionawr 2013
 | Spotlight
 |  | 17%
 | 65%
 | 5%
 | 12%
 | 48%
 |  |
| Tachwedd 2003
 | Millward Brown Ulster
 | 1058
 | 26%
 | 61%
 | 13%
 | 35%
 |  |
| Hydref-canol Ionawr 2002
 | NI Life and Times Survey
 | 1800
 | 27%
 | 54%
 | 10%
 | 6%
 | 27%
 |  |
| Mai 2001
 | Millward Brown Ulster
 |  | 27%
 | 58%
 | 15%
 | 31%
 |  |
| Mehefin 1998
 | Millward Brown Ulster
 |  | 25%
 | 63%
 | 12%
 | 38%
 |  |
| Arwyddo Cytundeb Belffast, 10 Ebrill 1998
 |  |

## Fel aelod o'r Undeb Ewropeaidd

| Dyddiad
 | Cwmni Arolwg Barn
 | Sampl
 | Ie
 | Na
 | Heb benderfynu
 |
| --- | --- | --- | --- | --- | --- |
| Mawrth 26-31 2026
 | Amarach Research
 | 1,200
 | 63%
 | 29%
 | -
 |

## Wrth oedran

#### Arolwg barn 2025 LucidTalk

| Ateb
 |  | Grwp oedran
 |
| --- | --- | --- |
| <35
 | 35–44
 | 45–54
 | 55+
 |
| Ie (Iwerddon Unedig)
 | 36%
 | 34%
 | 36%
 | 34%
 |
| Na
 | 44%
 | 37%
 | 55%
 | 51%
 |
| Arwain
 | 6%
 | 12%
 | 19%
 | 17%
 |

## Yn y dyfodol

| Dyddiad
 | Cwmni Arolwg Barn
 | Maint sampl
 | Ie
 | Na
 | Heb benderfynu
 | Ddim am bleidleisio
 | Arwain
 | Cwestiwn
 |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 2025
 | LucidTalk/Belfast Telegraph
 |  | 53%
 |  |  |  |  | Mewn 20 mlynedd
 |
| 9–12 Chwefror 2024
 | LucidTalk
 | 3,207
 | 52%
 | 44%
 | –
 |  | 8%
 | Rhywbryd yn y dyfodol
 |
| 17–30 Mehefin 2023
 | The Institute of Irish Studies/Social Market Research
 | –
 | 40%
 | 36%
 | –
 |  | 4%
 | Mewn 15-20 mlynedd
 |
| Awst 2022
 | LucidTalk
 | 3,384
 | 52%
 | 44%
 | 4%
 |  | 8%
 | Os cynhelir refferendwm mewn 15-20 mlynedd
 |
| 11–26 Mawrth 2022
 | Prifysgol Lerpwl/The Irish News
 | 1,000
 | 33.4%
 | 41.5%
 | \*17.9%\*
 | 7.6%
 | 8.1%
 | Mewn 15-20 mlynedd
(\*Ddim yn cytuno/nac yn anghytuno)

 |
| Hydref 2015
 | RTÉ BBC NI Cross Border Survey : ROI + NI
 | 1,407
 | 30%
 | 43%
 | 27%
 |  | 13%
 | "...yn ystod eich bywyd?"
 |

## Gweler hefyd

* Annibyniaeth yr Alban
* Arolygon barn ar annibyniaeth yr Alban
* Annibyniaeth i Gymru
* Arolygon barn ar annibyniaeth i Gymru
* Etholiad nesaf Cynulliad Gogledd Iwerddon

## Cyfeiriadau