Plaid Cymru Polling
12% at Westminster, 20% Senedd constituency, 22% Senedd regional as of May 2026. Plaid Cymru leader Rhun ap Iorwerth, Welsh independence and the party of Wales.
Plaid Cymru — Vote Share by Election Type
Westminster vs Senedd: A very different picture
Plaid Cymru faces a structural challenge: Westminster elections use First Past the Post, which severely penalises parties with geographically concentrated support. Plaid's vote is strongest in Welsh-speaking north and west Wales, meaning it can win Westminster seats there but its Wales-wide 12% vote share translates to only four seats at Westminster in 2024. At Senedd elections under proportional representation, however, Plaid's support translates much more fairly into seats — making them the second-largest party in Cardiff Bay.
Plaid Cymru at Westminster — Wales VI Comparison
Leader: Rhun ap Iorwerth
Rhun ap Iorwerth — leader since 2023
Rhun ap Iorwerth became Plaid Cymru leader in 2023, succeeding Adam Price. A former television journalist and MS for Ynys Mon (Anglesey), ap Iorwerth is a Welsh-language speaker and represents Plaid's cultural heartland. He took over a party that had just completed two years of the Co-operation Agreement with Welsh Labour — a period of influence but also questions about whether Plaid received sufficient credit for its role in government. His challenge is to grow Plaid beyond its north and west Wales base into the south Wales valleys and urban areas like Cardiff and Swansea — Labour strongholds where Plaid has historically struggled to break through.
Plaid's Geographic Strengths and Weaknesses
Plaid Cymru strongholds
- Gwynedd — council controlled by Plaid; MP seat held
- Ynys Mon (Anglesey) — leader ap Iorwerth MS seat
- Ceredigion — Welsh-speaking mid-Wales; Plaid stronghold
- Carmarthenshire — competitive with Labour
- Parts of Pembrokeshire (Welsh-speaking north)
- Some Cardiff West and Swansea constituencies
Where Plaid struggles
- South Wales valleys — deep Labour territory
- Newport, Cardiff Bay and eastern urban areas
- North-east Wales (Wrexham, Flintshire) — Anglicised border areas
- Swansea East and Port Talbot — strong Labour tradition
- Any area where Reform UK is the main challenger to Labour
Plaid Cymru and Independence
Independence: aspiration vs immediate demand
Plaid Cymru is formally committed to Welsh independence as a long-term goal, but the party has been notably cautious about when and how to pursue it. With independence polling at only 22% in Wales, Plaid leaders have generally avoided making an immediate independence referendum their central electoral pitch. Instead, the party focuses on more immediate policy priorities: NHS reform, Welsh language protection, economic investment and devolution of more powers. This positioning separates Plaid from the SNP, which put independence at the centre of every election campaign from 2011 onwards. Some within Plaid argue for a bolder independence push to energise the base; others argue the party must win soft Labour voters who are pro-devolution but not pro-independence.
Plaid Cymru's Policy Priorities
Welsh language promotion
Plaid Cymru places the Welsh language at the centre of its political identity. The party has pushed for stronger language planning requirements, Welsh-medium education expansion and a target of one million Welsh speakers by 2050 (Cymraeg 2050 strategy). Plaid's language-first identity is both a strength — it is the only party seen as genuinely committed to Welsh — and a potential limitation in the more Anglicised parts of Wales.
Health and public services
NHS Wales reform is central to Plaid's domestic platform. During the Co-operation Agreement with Welsh Labour (2021–24), Plaid secured a commitment to a 36-hour maximum NHS waiting time target. Health policy is devolved to Cardiff, and Plaid has consistently argued that Welsh Labour has under-invested in NHS Wales relative to comparable nations. This is a vote-winning message in rural Wales where access to healthcare is a significant concern.
Economic policy — Welsh public sector
Plaid Cymru historically argued for a stronger Welsh economic policy, including calls for the devolution of more economic levers — such as rail infrastructure, ports and energy consenting — to Cardiff Bay. The party has called for greater Welsh Government control over economic development funds, particularly following the loss of EU Structural Funds after Brexit. It supports a cooperative economic model and has been critical of private-sector outsourcing in public services.
Plaid and Labour: Coalition dynamics
The 2021–24 Plaid–Labour Co-operation Agreement was a defining feature of recent Welsh politics. Plaid provided votes to keep Welsh Labour in government in exchange for specific policy commitments. Key wins included free school meals for all primary pupils, the NHS waiting time commitment, and a curriculum review. However, Plaid faced internal questions about whether it received sufficient credit for the arrangement. Going into 2026, Plaid had to decide whether to seek another coalition or position itself as a cleaner opposition.
Plaid Cymru's Westminster Seats (2024)
Related Wales pages
Frequently Asked Questions
What is Plaid Cymru polling in 2026?
Plaid Cymru polls at approximately 12% on Westminster voting intention in Wales and 20–22% on Senedd polling in 2026. Leader Rhun ap Iorwerth has stabilised the party following internal controversy. Plaid is part of the Welsh governing arrangement alongside Welsh Labour, giving them ministerial positions and policy influence in Cardiff Bay.
Who leads Plaid Cymru and what is their approval rating?
Rhun ap Iorwerth has led Plaid Cymru since 2023, succeeding Adam Price after internal party turmoil. His approval rating in Welsh polls is broadly neutral at approximately −2% net. Plaid polls best in Y Fro Gymraeg (Welsh-speaking heartland), Gwynedd, Ceredigion, and parts of Carmarthenshire. The party’s strategic challenge is expanding beyond the Welsh-speaking base into Labour-held urban and post-industrial areas.
What is Plaid Cymru’s position on Welsh independence?
Plaid Cymru officially supports Welsh independence but has moved toward a gradualist approach rather than prioritising independence as a near-term goal. The party favours expanding devolution and fiscal autonomy before a formal independence referendum. With independence polling at only 22%, the party focuses on more immediate priorities: NHS reform, Welsh language protection, and economic investment. Independence remains a long-term aspiration rather than an immediate political project.
Why does Plaid Cymru poll higher in Senedd elections than Westminster elections?
Proportional representation in the Senedd means votes translate more directly into seats, eliminating the incentive for tactical voting that depresses Plaid support in FPTP Westminster contests. In Westminster elections, Plaid-sympathetic voters in Labour–Plaid marginals often vote Labour to prevent Reform UK or Conservative wins. Under the Senedd proportional system this calculation disappears. Senedd elections also carry a distinct Welsh identity, making voters more willing to support Welsh-focused parties.
What are the most winnable Westminster seats for Plaid Cymru in 2029?
Plaid currently holds Dwyfor Meirionnydd, Ceredigion Preseli, and Arfon. Ynys Mon was very competitive in 2024. Potential gains include Neath and Swansea West if Labour support collapses further, and Carmarthen East and Dinefwr where Plaid has historically been competitive. The main complication is Reform UK competing for the anti-Labour vote in some of the same South Wales constituencies, potentially splitting the non-Labour vote in ways that help Labour hold seats.
How likely is another Plaid Cymru–Welsh Labour coalition in 2031?
A governing arrangement is structurally likely given Welsh Labour’s consistent failure to win outright majorities under the new proportional Senedd system. The 2026 result reproduced the need for Labour–Plaid cooperation. The key question for 2031 is whether Welsh Labour is willing to offer Plaid sufficient policy concessions to maintain a governing arrangement, or whether the relationship breaks down over Welsh independence, which Plaid is likely to press harder in the next electoral cycle.