Plaid Cymru Target Seats

Below are lists of Plaid Cymru target seats showing which constituencies can be most easily won from an opposing party relative to the latest elections.

Contents

» UK Parliament

» Senedd

Plaid Cymru Target Seats 2029

Below is the list of Plaid Cymru target seats for the 2029 general election. The list is ordered from the smallest to the largest swing needed for the seat to change hands.

View Plaid Cymru held marginal seats vulnerable at the next general election.

(order by percentage majority)

Rank		Region	Majority over PC	Swing Needed
1.	Llanelli	Wales	3,240	4.26%
2.	Bangor Aberconwy	Wales	4,896	5.88%
3.	Cardiff West	Wales	7,019	7.84%
4.	Montgomeryshire and Glyndwr	Wales	7,042	8.14%
5.	Caerphilly	Wales	6,419	8.39%
6.	Pontypridd	Wales	10,950	13.90%
7.	Neath and Swansea East	Wales	11,447	14.26%
8.	Wrexham	Wales	11,698	14.49%
9.	Swansea West	Wales	10,656	14.94%
10.	Bridgend	Wales	12,887	15.57%
11.	Merthyr Tydfil and Aberdare	Wales	11,023	15.65%
12.	Cardiff East	Wales	12,283	15.70%
13.	Newport West and Islwyn	Wales	13,880	16.54%
14.	Rhondda and Ogmore	Wales	11,920	16.65%
15.	Cardiff North	Wales	16,180	17.04%
16.	Gower	Wales	16,538	17.51%
17.	Torfaen	Wales	12,605	17.65%
18.	Cardiff South and Penarth	Wales	14,201	18.12%
19.	Newport East	Wales	14,131	18.34%
20.	Aberafan Maesteg	Wales	13,119	18.35%

View Plaid Cymru held marginal seats vulnerable at the next general election.

Plaid Cymru Target Seats for the 2026 Senedd Election

Below is the list of Plaid Cymru target seats for the 2026 Senedd election. The list is ordered from the smallest to the largest swing needed for the seat to change hands.

View Plaid Cymru held marginal seats vulnerable at the next Senedd election.

(order by percentage majority)

Rank		Region	Majority over PC	Swing Needed
1.	Aberconwy	North Wales	3,336	7.08%
2.	Caerphilly	South Wales East	5,078	8.78%
3.	Llanelli	Mid and West Wales	5,675	9.39%
4.	Neath	South Wales West	5,221	9.47%
5.	Pontypridd	South Wales Central	5,328	9.67%
6.	Wrexham	North Wales	3,620	10.04%
7.	Clwyd West	North Wales	6,230	10.98%
8.	Carmarthen West and Pembrokeshire South	Mid and West Wales	4,625	11.65%
9.	Rhondda	South Wales Central	5,497	11.72%
10.	Islwyn	South Wales East	6,032	12.32%
11.	Aberavon	South Wales West	5,745	12.96%
12.	Clwyd South	North Wales	6,354	14.22%
13.	Swansea West	South Wales West	7,216	15.04%
14.	Montgomeryshire	Mid and West Wales	7,528	15.06%
15.	Preseli Pembrokeshire	Mid and West Wales	6,160	15.10%
16.	Blaenau Gwent	South Wales East	6,638	15.94%
17.	Cardiff West	South Wales Central	11,768	16.11%
18.	Ogmore	South Wales West	8,165	16.67%
19.	Cardiff Central	South Wales Central	9,630	16.88%
20.	Bridgend	South Wales West	9,297	17.76%
21.	Cardiff South and Penarth	South Wales Central	13,196	18.13%
22.	Cynon Valley	South Wales Central	7,468	18.20%
23.	Torfaen	South Wales East	9,008	18.80%
24.	Gower	South Wales West	11,685	20.78%
25.	Brecon and Radnorshire	Mid and West Wales	10,666	21.32%

View Plaid Cymru held marginal seats vulnerable at the next Senedd election.

2029 General Election

Poll of Polls

Seat-By-Seat Forecast

Custom Swingometer 2029

LAB - Targets | Defence

CON - Targets | Defence

LD - Targets | Defence

REF - Targets | Defence

GRN - Targets | Defence

2024 General Election Results