Plaid Cymru — Party of Wales
Plaid Cymru Polling Trend in Wales
▬ Holding steady at 12%| Election | Plaid % | Seats | Key Context |
|---|---|---|---|
| 2019 General Election (Wales) | 9.9% | 4 | Boris Johnson wave; Plaid held ground in Welsh-speaking heartlands |
| 2021 Senedd Election | 20.3% | 13 | Best Senedd result; Cooperative Agreement reached with Labour Welsh Government |
| 2024 General Election (Wales) | 14.8% | 4 | Held 4 seats; Reform UK surge visible in Welsh valleys constituency results |
| 2025 (Wales polls) | 13% | — | Senedd polling stable; party positions for 2026 expanded Senedd |
| May 2026 (Senedd polls) | 12% | — | Reform UK at 18% in Wales; new 96-seat PR system changes the seat calculus |
Senedd 2026: A New System, New Stakes
PR System Benefits Plaid
Under the new closed-list PR system, 12% of the vote should translate to roughly 11–13 Senedd seats out of 96 — maintaining meaningful presence and leverage. In the 2021 election, Plaid 20% on the regional list produced 13 seats out of 60. With 12% under a cleaner PR system, Plaid is projected to win 10–13 seats in 2026.
Reform UK Threat in Welsh Labour Wales
Reform UK polls at 18% in Wales — a region of post-industrial communities that voted heavily for Brexit in 2016. The Reform surge is predominantly in former Labour strongholds in the South Wales Valleys and North Wales, not in Plaid Welsh-speaking western heartlands. However, it makes Welsh Government arithmetic more complex for any post-election cooperation involving Plaid.
Leadership: Adam Price and Rhun ap Iorwerth
Adam Price (2018–2023)
Adam Price led Plaid through ambitious policy development including the 2021 Cooperative Agreement with the Welsh Labour Government. Price pushed Welsh independence as an explicit priority and oversaw the party best Senedd result (20.3% in 2021). He resigned in 2023 following an independent review that found a culture of misogyny and bullying within the party.
Rhun ap Iorwerth (2023–present)
Rhun ap Iorwerth, a former Welsh-language broadcaster and long-serving MS for Ynys Mon, was elected leader in June 2023. A widely respected figure in Welsh public life, he brought stability following the culture review. He positions Plaid as the natural opposition to Welsh Labour ahead of the 2026 Senedd elections.
Welsh Independence: Polling Trends
| Year | Independence Support | Against Independence | Context |
|---|---|---|---|
| 2014 | ~10% | ~75% | Pre-Brexit; Welsh independence a fringe position |
| 2016 (post-Brexit) | ~15% | ~68% | Brexit vote won; some Welsh nationalists energised |
| 2019 | 20–25% | 55–60% | Boris Johnson majority; anti-Westminster sentiment rises |
| 2021 (YesCymru peak) | 30–35% | 45–50% | COVID contrast between Welsh and Westminster governance |
| 2025–2026 | ~28% | ~52% | Independence a long-term aspiration; 2026 Senedd immediate focus |
Plaid Cymru Key Policy Positions
Welsh Independence
Long-term goal of Welsh independence and EU re-entry as an independent nation. Supports a referendum when polling shows consistent majority support (currently around 28–30%).
Welsh Language
Committed to a million Welsh speakers by 2050 (current: ~900,000). Supports Welsh-medium education as default, extending Welsh language rights in public services, and protecting Welsh-speaking communities.
Devolution Expansion
Calls for full fiscal devolution including control over income tax, corporation tax in Wales, and borrowing powers. Wants police and justice devolved from Westminster to Cardiff Bay.
Green Economy
Backed the Well-being of Future Generations Act and advocates for Wales becoming a net exporter of renewable energy. Supports community energy ownership and opposes energy poverty.
NHS Wales
Calls for significant additional Barnett Formula funding for the fully devolved Welsh NHS. Opposes privatisation. Welsh NHS waiting lists are a key 2026 Senedd battleground.
Anti-Austerity
Consistently opposed Westminster austerity. Supports public sector wage restoration, free prescriptions (already in Wales), and social housing investment.
Who Votes Plaid? — Voter Demographics
Plaid support by Welsh region (2026 Senedd polling)
| Region | Plaid % | Character |
|---|---|---|
| Gwynedd / Arfon | ~40% | Welsh-speaking heartland; Plaid stronghold |
| Ynys Môn | ~35% | Plaid–Labour marginal; key Senedd target |
| Ceredigion | ~33% | Rural, highly Welsh-speaking; consistent Plaid seat |
| Dwyfor Meirionnydd | ~38% | Rural north-west; strongest Plaid territory |
| Cardiff region | ~10% | Urban; Labour dominant; Plaid targets student vote |
| South Wales Valleys | ~7% | Post-industrial; Labour base; Reform surging |
| South Wales East | ~5% | Least Welsh-speaking; Brexit-heavy; Reform territory |
Source: YouGov / Survation Welsh polls, composite May 2026.
Plaid support by age and language (Wales only)
Key demographic insight
- Welsh-speakers are 5× more likely to vote Plaid than non-speakers
- Over-65 Welsh voters heavily favour Labour; under-35 Welsh voters are more split
- Reform UK’s surge is predominantly among non-Welsh-speaking working-class voters in the east and south — a demographic Plaid has never held
- 72% of Plaid supporters also back Welsh independence; only 28% of Welsh independence supporters vote Plaid
Senedd 2026: Projected Seats Under the New PR System
| Party | Wales poll % | Projected seats (of 96) | 2021 seats (of 60) | Position |
|---|---|---|---|---|
| Labour | 34% | 32 | 30 | Largest party; short of majority (49 needed) |
| Reform UK | 18% | 17 | 0 | New force; no Senedd history; list-only |
| Conservatives | 13% | 12 | 16 | Down from 2021; squeezed by Reform |
| Plaid Cymru | 12% | 11 | 13 | Holds ground; kingmaker potential |
| Lib Dems | 8% | 8 | 1 | Big gain; urban + rural liberal vote |
| Greens | 5% | 5 | 1 | Entry-level presence; youth vote driver |
Seat projections based on d’Hondt method applied to May 2026 YouGov/Survation Wales composite. Majority threshold: 49 seats.
Plaid Cymru’s Senedd 2026 strategy
- Plaid is the only party positioned to prop up either a Labour minority government or oppose it from the left
- The Cooperation Agreement (2021–2024) expired — no pre-arranged deal for 2026
- Rhun ap Iorwerth has avoided committing to another coalition; Plaid’s price would likely include a Welsh independence referendum timeline
- With Reform UK projected at 17 seats, a Labour–Plaid understanding is the most arithmetically plausible path to Welsh Government stability
Frequently Asked Questions
What is Plaid Cymru polling at in 2026?
Plaid Cymru polls at approximately 12% in Wales ahead of the May 2026 Senedd election, placing it fourth behind Labour (34%), Reform UK (18%), and Conservatives (13%). Under the new 96-seat proportional Senedd, this translates to a projected 10–12 seats. Plaid is down from its 2021 peak of 20.3% but maintains its core Welsh-speaking western Wales base intact.
Who leads Plaid Cymru?
Rhun ap Iorwerth has led Plaid Cymru since June 2023, succeeding Adam Price who resigned following an independent review that found a culture of misogyny and bullying within the party. Ap Iorwerth, a former Welsh-language broadcaster and long-serving MS for Ynys Môn, is widely respected in Welsh public life and has stabilised the party ahead of the 2026 Senedd elections.
Does Plaid Cymru stand in English constituencies?
No. Plaid Cymru contests elections only in Wales — both Westminster general elections and Senedd elections. It has no candidates, members, or party structure in England, Scotland, or Northern Ireland. Its 4 Westminster MPs all represent Welsh constituencies. This makes Plaid a purely devolved-nation party, unlike the SNP, which similarly contests only Scottish seats.
What is support for Welsh independence?
Support for Welsh independence polls at approximately 28% in Wales in 2026, having risen from around 10% pre-Brexit. It peaked at 30–35% during the COVID-19 pandemic when Welsh Labour’s devolved health response was seen as more decisive than Westminster’s. Welsh independence support remains significantly lower than Scottish independence support (45–48%) and below the level needed to trigger a viable referendum campaign. Full Wales polling data →
How does Plaid Cymru differ from the SNP?
Both parties are pro-independence and pro-EU re-entry, but there are key structural differences. The SNP has governed Scotland since 2007 and secured two independence referendums (2014, 2023); Plaid has never governed Wales alone and independence polling in Wales is significantly lower. Plaid operates in a country of 3.2 million people versus Scotland’s 5.5 million, with a smaller Welsh-language base (~900,000 speakers) driving its core vote. The two parties cooperate informally in Westminster but are distinct organisations.
What are the projected seat totals for the May 2026 Senedd election?
Under the new 96-seat proportional Senedd system, projections for May 2026 suggest: Labour 32 seats (short of the 49-seat majority), Reform UK 17, Conservatives 12, Plaid Cymru 11, Lib Dems 8, Greens 5. No party is projected to win a majority under current polling. The most likely outcome is a minority Labour Welsh Government relying on Plaid Cymru support. Reform UK winning 17 seats would represent their first ever Senedd representation. Full Senedd 2026 projections →
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