This is alist of Plaid Cymru MPs. It includes allmembers of Parliament elected to theBritish House of Commons representingPlaid Cymru. Members of theSenedd or theEuropean Parliament are not listed.
| Name | Constituency | Served from | Served to | Term length | Days |
|---|---|---|---|---|---|
| Dafydd Wigley | Caernarfon | 28 February 1974 | 7 June 2001 | 27 years, 99 days | 9,961 |
| Hywel Williams | Caernarfon thenArfon | 8 June 2001 | 30 May 2024 | 22 years, 357 days | 8,392 |
| Elfyn Llwyd | Meirionnydd Nant Conwy thenDwyfor Meirionnydd | 9 April 1992 | 30 March 2015 | 22 years, 355 days | 8,390 |
| Dafydd Elis-Thomas | Meirionnydd thenMeirionnydd Nant Conwy | 28 February 1974 | 9 April 1992 | 18 years, 41 days | 6,615 |
| Ieuan Wyn Jones | Ynys Môn | 11 June 1987 | 7 June 2001 | 13 years, 361 days | 5,110 |
| Liz Saville Roberts | Dwyfor Meirionnydd | 8 May 2015 | present | 10 years, 200 days | 3,853 |
| Jonathan Edwards | Carmarthen East and Dinefwr | 6 May 2010 | 22 May 2020[n 1] | 10 years, 16 days | 3,669 |
| Adam Price | Carmarthen East and Dinefwr | 8 June 2001 | 12 April 2010 | 8 years, 308 days | 3,230 |
| Gwynfor Evans | Carmarthen | 14 July 1966 | 18 June 1970 | 8 years 5 months 27 days | 3,101 |
| 10 October 1974 | 3 May 1979 | ||||
| Ben Lake | Ceredigion | 9 June 2017 | present | 8 years, 168 days | 3,090 |
| Cynog Dafis | Ceredigion and Pembroke North thenCeredigion | 9 April 1992 | 8 January 2000 | 7 years, 274 days | 2,830 |
| Simon Thomas | Ceredigion | 3 February 2000 | 5 May 2005 | 5 years, 91 days | 1,918 |
| Ann Davies | Caerfyrddin | 4 July 2024 | present | 1 year, 143 days | 508 |
| Llinos Medi | Ynys Môn | 4 July 2024 | present | 1 year, 143 days | 508 |
Dates are taken from a House of Commons Library Briefing.[1] Following a rule change that came into force at the 2005 general election MPs who were defeated (eg Simon Thomas) are shown as serving up to and including the day of the election at which they were defeated. MPs who voluntarily stood down (eg Elfyn Llwyd) are shown as serving up until the day of dissolution of their final Parliament.
| Constituency | 1966 | 1970 | Feb 74 | Oct 74 | 1979 | 1987 | 1992 | 1997 | 2000 | 2001 | 2005 | 2010 | 2015 | 2017 | 2019 | 2020 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Carmarthen /Carmarthen East and Dinefwr /Caerfyrddin | Evans | Evans | Price | Edwards | Davies | ||||||||||||
| Caernarfon /Arfon | Wigley | Williams | |||||||||||||||
| Merionethshire / Meirionnydd Nant Conwy (1983-2010) /Dwyfor Meirionnydd | Elis-Thomas | Llwyd | Saville Roberts | ||||||||||||||
| Ynys Môn | Wyn Jones | Medi | |||||||||||||||
| Ceredigion & Pembroke North /Ceredigion /Ceredigion Preseli | Dafis | Thomas | Lake | ||||||||||||||
| No. of Plaid Cymru MPs | 1 | 0 | 2 | 3 | 2 | 3 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 4 | 4 | 3 | 4 |