Plaid Cymru election results
This article lists Plaid Cymru's election results in UK parliamentary, European parliamentary, and Welsh Assembly elections.
Summary of electoral performance
Westminster elections
| Year | Constituencies | Votes | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Number of candidates | Saved deposits[1] | Number of elected MPs | Change | Total | Average per candidate | % UK vote | % Welsh vote | Change (percentage points) | ||
| 1929 | 1 | 0 | – |  | 609 | 609 | 0.0% | 0.0% | New | |
| 1931 | 2 | 1 | – | | 2,050 | 1,025 | 0.0% | 0.2% |  | |
| 1935 | 1 | 0 | – | | 2,534 | 2,534 | 0.0% | 0.3% | | |
| 1945 | 7 | 1 | – | | 16,017 | 2,288 | 0.0% | 1.2% | | |
| 1950 | 7 | 1 | – | | 17,580 | 2,288 | 0.1% | 1.2% | | |
| 1951 | 4 | 0 | – | | 10,920 | 2,730 | 0.0% | 0.7% |  | |
| 1955 | 11 | 4 | – | | 45,119 | 4,102 | 0.2% | 3.1% | | |
| 1959 | 20 | 6 | – | | 77,571 | 3,879 | 0.3% | 5.2% | | |
| 1964 | 23 | 2 | – | | 69,507 | 3,022 | 0.3% | 4.8% | | |
| 1966 | 20 | 2 | – | | 61,071 | 3,054 | 0.2% | 4.3% | | |
| 1970 | 36 | 11 | – | | 175,016 | 4,862 | 0.6% | 11.5% | | |
| 1974 Feb | 36 | 10 | 2 | | 171,374 | 4,760 | 0.5% | 10.8% | | |
| 1974 Oct | 36 | 10 | 3 | | 166,321 | 4,620 | 0.6% | 10.8% | | |
| 1979 | 36 | 7 | 2 | | 132,544 | 3,682 | 0.4% | 8.2% | | |
| 1983 | 38 | 6 | 2 | | 125,309 | 3,298 | 0.4% | 7.8% | | |
| 1987 | 38 | 13 | 3 | | 123,599 | 3,253 | 0.4% | 7.3% | | |
| 1992 | 38 | 15 | 4 | | 156,796 | 4,126 | 0.5% | 9.0% | | |
| 1997 | 40 | 25 | 4 | | 161,030 | 4,026 | 0.5% | 9.9% | | |
| 2001 | 40 | 35 | 4 | | 195,893 | 4,897 | 0.7% | 14.3% | | |
| 2005 | 40 | 32 | 3 | | 174,838 | 4,371 | 0.6% | 12.6% | | |
| 2010 | 40 | 29 | 3 | | 165,394 | 4,135 | 0.6% | 11.3% | | |
| 2015 | 40 | 32 | 3 | | 181,704 | 4,543 | 0.6% | 12.1% | | |
| 2017 | 40 | 24 | 4 | | 164,466 | 4,112 | 0.5% | 10.4% | | |
| 2019 | 36 | 27 | 4 | | 153,265 | 4,257 | 0.5% | 9.9% | | |
Welsh Assembly elections
| Date | Constituency | Region | Total seats | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Votes | % | +/- | Seats | +/- | Votes | % | +/- | Top-up seats | +/- | Total | +/- | % | ||
| 1999 | 290,572 | 28.4% | N/A | 9 / 40 | N/A | 312,048 | 30.5% | N/A | 8 / 20 | N/A | 17 / 60 | N/A | 28.3% | |
| 2003 | 180,185 | 21.2% | | 5 / 40 | | 167,653 | 19.7% | | 7 / 20 | | 12 / 60 | | 20.0% | |
| 2007 | 219,121 | 21.4% | | 7 / 40 | | 204,757 | 21.0% | | 8 / 20 | | 15 / 60 | | 25.0% | |
| 2011 | 182,907 | 19.3% | | 5 / 40 | | 169,799 | 17.9% | | 6 / 20 | | 11 / 60 | | 18.3% | |
| 2016 | 209,376 | 20.5% | | 6 / 40 | | 211,548 | 20.8% | | 6 / 20 | | 12 / 60 | | 20.0% | |
European Parliament elections
| Date | Votes | Welsh seats | |||||
|---|---|---|---|---|---|---|---|
| # | % | +/- | # | +/- | % | ||
| 1979 | 83,399 | 11.7% | N/A | 0 / 4 | N/A | 0% | |
| 1984 | 103,031 | 12.2% | | 0 / 4 | | 0% | |
| 1989 | 115,062 | 12.9% | | 0 / 4 | | 0% | |
| 1994 | 162,478 | 17.1% | | 0 / 5 | | 0% | |
| 1999 | 185,235 | 29.6% | | 2 / 5 | | 40% | |
| 2004 | 159,888 | 17.4% | | 1 / 4 | | 25% | |
| 2009 | 126,702 | 18.5% | | 1 / 4 | | 25% | |
| 2014 | 111,864 | 15.3% | | 1 / 4 | | 25% | |
| 2019 | 163,928 | 19.6% | | 1 / 4 | | 25% | |
Elections results
1929 general election
| Constituency | Candidate | Votes | % | Position |
|---|---|---|---|---|
| Caernarvonshire | Lewis Valentine | 609 | 1.6 | 4 |
1931 general election
| Constituency | Candidate | Votes | % | Position |
|---|---|---|---|---|
| Caernarvonshire | John Edward Daniel | 1,136 | 3.0 | 4 |
| University of Wales | Saunders Lewis | 914 | 29.1 | 2 |
1935 general election
| Constituency | Candidate | Votes | % | Position |
|---|---|---|---|---|
| Caernarvonshire | John Edward Daniel | 2,534 | 6.9 | 3 |
By-elections 1935-1945
| Election | Candidate | Votes | % | Position |
|---|---|---|---|---|
| 1943 University of Wales by-election | Saunders Lewis | 1,330 | 22.5 | 2 |
| 1945 Caernarvon Boroughs by-election | John Edward Daniel | 6,844 | 24.8 | 2 |
| 1945 Neath by-election | Wynne Samuel | 6,290 | 16.2 | 2 |
1945 general election
| Constituency | Candidate | Votes | % | Position |
|---|---|---|---|---|
| Caernarvon Boroughs | John Edward Daniel | 1,560 | 4.5 | 4 |
| Caernarvonshire | Ambrose Bebb | 2,152 | 5.4 | 3 |
| Merioneth | Gwynfor Evans | 2,448 | 10.3 | 4 |
| Neath | Wynne Samuel | 3,659 | 7.3 | 3 |
| Ogmore | Trefor Richard Morgan | 2,379 | 5.6 | 3 |
| Rhondda East | James Kitchener Davies | 2,123 | 6.1 | 3 |
| University of Wales | Gwenan Jones | 1,696 | 24.5 | 2 |
By-elections 1945-1950
| Election | Candidate | Votes | % | Position |
|---|---|---|---|---|
| 1946 Ogmore by-election | Trefor Richard Morgan | 5,685 | 29.4 | 2 |
| 1946 Aberdare by-election | Wynne Samuel | 7,090 | 20.0 | 2 |
1950 general election
| Constituency | Candidate | Votes | % | Position |
|---|---|---|---|---|
| Aberdare | Wynne Samuel | 3,310 | 7.5 | 3 |
| Caernarvon | John Edward Jones | 4,882 | 13.1 | 4 |
| Llanelly | David Eirwyn Morgan | 2,134 | 3.8 | 4 |
| Merioneth | Gwynfor Evans | 2,754 | 11.0 | 4 |
| Rhondda East | David James Davies | 1,357 | 3.9 | 4 |
| Rhondda East | James Kitchener Davies | 2,183 | 6.6 | 3 |
| Wrexham | Geraint Bowen | 960 | 1.7 | 4 |
1951 general election
| Constituency | Candidate | Votes | % | Position |
|---|---|---|---|---|
| Aberdare | Wynne Samuel | 2,691 | 6.1 | 3 |
| Llanelly | David Eirwyn Morgan | 3,765 | 6.9 | 3 |
| Rhondda West | James Kitchener Davies | 2,467 | 7.7 | 3 |
| Wrexham | Dan Thomas | 1,997 | 3.6 | 3 |
By-elections 1951-1955
| Election | Candidate | Votes | % | Position |
|---|---|---|---|---|
| 1955 Wrexham by-election | Elystan Morgan | 4,572 | 11.3 | 3 |
1955 general election
| Constituency | Candidate | Votes | % | Position |
|---|---|---|---|---|
| Aberdare | Trefor Beasley | 3,703 | 9.4 | 3 |
| Abertillery | Trefor Richard Morgan | 1,259 | 4.1 | 3 |
| Anglesey | J. Rowland Jones | 2,183 | 7.5 | 3 |
| Caernarvon | Robert E. Jones | 5,815 | 16.5 | 3 |
| Carmarthen | Jennie Eirian Davies | 3,835 | 7.8 | 3 |
| Conway | Ioan Bowen Rees | 3,019 | 7.8 | 3 |
| Gower | Chris Rees | 4,101 | 10.6 | 3 |
| Llanelly | David Eirwyn Morgan | 6,398 | 12.5 | 3 |
| Merioneth | Gwynfor Evans | 5,243 | 22.2 | 3 |
| Rhondda East | Noel Williams | 2,776 | 8.8 | 4 |
| Rhondda West | Glyn James | 4,424 | 15.3 | 2 |
| Wrexham | Elystan Morgan | 5,139 | 10.4 | 3 |
By-elections 1955-1959
| Election | Candidate | Votes | % | Position |
|---|---|---|---|---|
| 1956 Newport by-election | Emrys Roberts | 1,978 | 3.8 | 3 |
| 1957 Carmarthen by-election | Jennie Eirian Davies | 5,741 | 11.5 | 3 |
| 1958 Pontypool by-election | Benjamin Morgan | 2,927 | 10.0 | 3 |
1959 general election
| Constituency | Candidate | Votes | % | Position |
|---|---|---|---|---|
| Aberavon | Iixtyd Lewis | 3,066 | 6.6 | 3 |
| Aberdare | Ken Thomas | 3,367 | 8.2 | 3 |
| Anglesey | R. Tudur Jones | 4,121 | 14.6 | 3 |
| Caernarvon | Dafydd Orwig Jones | 7,293 | 21.2 | 3 |
| Caerphilly | John Howell | 3,420 | 8.8 | 3 |
| Cardiff North | Emrys Roberts | 2,553 | 5.1 | 3 |
| Cardigan | Gareth Evans | 3,880 | 12.8 | 3 |
| Carmarthen | Hywel Heulyn Roberts | 2,545 | 5.2 | 3 |
| Conway | Ioan Bowen Rees | 2,852 | 7.6 | 4 |
| Denbigh | Dafydd Alun Jones | 3,077 | 7.2 | 4 |
| Gower | J. Gwyn Griffiths | 3,744 | 9.1 | 3 |
| Llanelly | David Eirwyn Morgan | 7,176 | 13.8 | 3 |
| Merioneth | Gwynfor Evans | 5,127 | 22.9 | 3 |
| Pembrokeshire | Waldo Williams | 2,253 | 4.3 | 3 |
| Pontypool | Benjamin Morgan | 2,519 | 6.6 | 3 |
| Rhondda East | Noel Williams | 2,776 | 8.8 | 4 |
| Rhondda West | Glyn James | 4,978 | 17.0 | 2 |
| Swansea East | Chris Rees | 4,651 | 10.5 | 3 |
| West Flintshire | Nefyl Williams | 1,594 | 4.1 | 4 |
| Wrexham | Elystan Morgan | 6,579 | 12.2 | 3 |
By-elections 1959-1964
| Election | Candidate | Votes | % | Position |
|---|---|---|---|---|
| 1960 Ebbw Vale by-election | Emrys Roberts | 2,091 | 7.0 | 4 |
| 1962 Montgomeryshire by-election | Islwyn Ffowc Elis | 1,594 | 6.2 | 4 |
| 1963 Swansea East by-election | Chris Rees | 1,620 | 5.2 | 4 |
1964 general election
| Constituency | Candidate | Votes | % | Position |
|---|---|---|---|---|
| Aberavon | Glyn John | 2,118 | 4.6 | 3 |
| Aberdare | Dewi Thomas | 2,723 | 7.2 | 3 |
| Anglesey | R. Tudur Jones | 1,817 | 6.5 | 4 |
| Brecon and Radnor | Trefor Richard Morgan | 2,165 | 5.2 | 3 |
| Caernarvon | Robert E. Jones | 6,998 | 21.4 | 3 |
| Caerphilly | Phil Williams | 3,956 | 11.0 | 3 |
| Cardiff North | Emrys Roberts | 1,058 | 2.2 | 4 |
| Cardigan | Gareth Evans | 3,262 | 10.9 | 4 |
| Carmarthen | Gwynfor Evans | 5,495 | 11.7 | 3 |
| Conway | Gwilym Hughes | 3,058 | 8.3 | 3 |
| Denbigh | Dafydd Alun Jones | 3,444 | 7.9 | 4 |
| Gower | J. Gwyn Griffiths | 2,562 | 6.5 | 3 |
| Llanelly | Pennar Davies | 3,469 | 7.0 | 4 |
| Merioneth | Elystan Morgan | 3,697 | 16.9 | 3 |
| Merthyr Tydfil | Ioan Bowen Rees | 2,878 | 9.3 | 3 |
| Montgomeryshire | Islwyn Ffowc Elis | 2,167 | 8.5 | 4 |
| Ogmore | Margaret Tucker | 2,470 | 5.3 | 3 |
| Pembrokeshire | Dyfrig Thomas | 1,717 | 3.4 | 4 |
| Pontypool | Benjamin Morgan | 2,519 | 6.6 | 3 |
| Rhondda East | Glyn James | 2,361 | 8.2 | 4 |
| Rhondda West | Henry V. Davies | 2,668 | 10.2 | 3 |
| Swansea East | Chris Rees | 3,556 | 8.4 | 3 |
| West Flintshire | Nefyl Williams | 1,195 | 3.0 | 4 |
| Wrexham | John R. Thomas | 4,673 | 8.9 | 3 |
By-elections 1964-1966
| Election | Candidate | Votes | % | Position |
|---|---|---|---|---|
| 1965 Abertillery by-election | Edward Merriman | 1,551 | 6.7 | 3 |
1966 general election
| Constituency | Candidate | Votes | % | Position |
|---|---|---|---|---|
| Aberdare | J. Eaton Williams | 3,073 | 8.6 | 3 |
| Anglesey | John Wynn Meredith | 2,596 | 9.6 | 3 |
| Brecon and Radnor | Trefor Richard Morgan | 2,410 | 6.1 | 3 |
| Caernarvon | Humphrey Roberts | 6,834 | 21.7 | 3 |
| Caerphilly | John D. Howell | 3,949 | 11.1 | 3 |
| Cardiganshire | Edward Millward | 2,469 | 8.1 | 4 |
| Carmarthen | Gwynfor Evans | 7,416 | 16.1 | 3 |
| Conway | Robert E. Jones | 2,552 | 6.7 | 3 |
| Denbigh | Meredith Edwards | 2,695 | 6.1 | 4 |
| East Flintshire | Gwilym Hughes | 902 | 1.9 | 4 |
| Llanelli | Pennar Davies | 5,132 | 10.9 | 3 |
| Merioneth | Ieuan Lewis Jenkins | 2,490 | 11.4 | 3 |
| Merthyr Tydfil | Meic Stephens | 3,361 | 11.5 | 3 |
| Montgomeryshire | Trefor Edwards | 1,841 | 7.4 | 4 |
| Pembrokeshire | Jack Sheppard | 2,460 | 5.0 | 4 |
| Rhondda East | Glyn James | 2,088 | 7.5 | 3 |
| Rhondda West | Henry Victor Davies | 2,172 | 8.7 | 2 |
| Swansea East | Chris Rees | 2,749 | 6.8 | 3 |
| West Flintshire | D. Alun Lloyd | 1,585 | 3.8 | 4 |
| Wrexham | John R. Thomas | 2,297 | 4.5 | 4 |
By-elections 1966-1970
| Election | Candidate | Votes | % | Position |
|---|---|---|---|---|
| 1966 Carmarthen by-election | Gwynfor Evans | 16,179 | 39.0 | 1 |
| 1967 Rhondda West by-election | Henry V. Davies | 10,067 | 39.9 | 2 |
| 1968 Caerphilly by-election | Phil Williams | 14,274 | 40.4 | 2 |
1970 general election
| Constituency | Candidate | Votes | % | Position |
|---|---|---|---|---|
| Aberavon | George Farmer | 3,912 | 8.4 | 3 |
| Aberdare | Gareth Morgan Jones | 11,431 | 30.0 | 2 |
| Abertillery | David B. Harries | 1,751 | 6.2 | 3 |
| Anglesey | John Lasarus Williams | 7,140 | 22.1 | 3 |
| Barry | Ogwen Williams | 4,200 | 7.1 | 3 |
| Bedwellty | Charles Davey | 3,780 | 10.0 | 3 |
| Brecon and Radnor | George Jenkins | 2,349 | 5.4 | 3 |
| Caernarfon | Robyn Lewis | 11,331 | 33.4 | 2 |
| Caerphilly | Phil Williams | 11,505 | 28.5 | 2 |
| Cardiff North | Morgan Edwards | 1,927 | 4.1 | 4 |
| Cardiff South East | Richard Davies | 2,585 | 5.1 | 3 |
| Cardiff West | D. J. Hughes | 4,378 | 10.1 | 3 |
| Cardiganshire | Hywel ap Robert | 6,498 | 19.7 | 3 |
| Carmarthen | Gwynfor Evans | 14,812 | 30.1 | 2 |
| Conway | Dafydd Elis-Thomas | 4,311 | 10.8 | 3 |
| Denbigh | E. Gwynn Matthews | 5,254 | 11.0 | 4 |
| East Flintshire | Gwilym Hughes | 2,332 | 4.4 | 4 |
| Ebbw Vale | Derek Baskerville | 1,805 | 6.0 | 4 |
| Gower | Clifford Davies | 5,869 | 14.0 | 3 |
| Llanelli | Carwyn James | 8,387 | 16.8 | 2 |
| Merionethshire | Dafydd Wigley | 5,425 | 24.3 | 2 |
| Merthyr Tydfil | Chris Rees | 3,076 | 9.6 | 4 |
| Monmouth | Stuart Neale | 1,501 | 2.5 | 4 |
| Montgomeryshire | Edward Millward | 3,145 | 11.8 | 4 |
| Neath | Glyn John | 4,012 | 10.1 | 3 |
| Newport | Bob Vickery | 1,997 | 3.7 | 3 |
| Ogmore | Ted Merriman | 5,828 | 11.7 | 3 |
| Pembrokeshire | Wynne Samuel | 3,681 | 6.7 | 4 |
| Pontypool | Harri Webb | 2,053 | 5.3 | 3 |
| Pontypridd | E. Jones | 5,059 | 10.4 | 4 |
| Rhondda East | Glyn James | 6,931 | 24.3 | 2 |
| Rhondda West | Henry Victor Davies | 3,528 | 14.1 | 2 |
| Swansea East | Roderick Evans | 4,188 | 10.2 | 3 |
| Swansea West | Guto ap Gwent | 3,033 | 6.2 | 3 |
| West Flintshire | Ogwen Jones | 3,108 | 6.9 | 4 |
| Wrexham | Cyril Golding | 2,894 | 5.3 | 4 |
By-elections 1970-1974
| Election | Candidate | Votes | % | Position |
|---|---|---|---|---|
| 1972 Merthyr Tydfil by-election | Emrys Roberts | 11,852 | 37.0 | 2 |
February 1974 general election
| Constituency | Candidate | Votes | % | Position |
|---|---|---|---|---|
| Aberavon | D. G. Foster | 5,898 | 12.2 | 3 |
| Aberdare | Glyn Owen | 11,973 | 29.9 | 2 |
| Abertillery | A. Richards | 3,119 | 10.9 | 2 |
| Anglesey | Dafydd Iwan | 7,610 | 21.7 | 3 |
| Barry | Valerie Wynne-Williams | 1,924 | 3.4 | 4 |
| Bedwellty | A. Moore | 3,048 | 7.7 | 4 |
| Brecon and Radnor | Dafydd Noel Gittins | 2,099 | 4.7 | 4 |
| Caernarfon | Dafydd Wigley | 14,103 | 40.5 | 1 |
| Caerphilly | Phil Williams | 11,956 | 27.5 | 2 |
| Cardiff North | P. Richards | 1,586 | 4.6 | 4 |
| Cardiff North West | Colin Palfrey | 1,227 | 3.4 | 4 |
| Cardiff South East | Keith Bush | 1,254 | 3.0 | 5 |
| Cardiff West | Dafydd Hughes | 2,093 | 5.5 | 4 |
| Cardiganshire | C. Davies | 4,754 | 13.3 | 4 |
| Carmarthen | Gwynfor Evans | 17,162 | 34.3 | 2 |
| Conway | M. Farmer | 4,203 | 10.1 | 4 |
| Denbigh | E. G. Matthews | 4,103 | 8.1 | 4 |
| East Flintshire | Neil Taylor | 1,135 | 2.0 | 4 |
| Ebbw Vale | J. D. Rogers | 1,767 | 5.9 | 4 |
| Gower | J. N. Harris | 3,741 | 8.3 | 4 |
| Llanelli | R. Williams | 6,020 | 12.0 | 4 |
| Merioneth | Dafydd Elis-Thomas | 7,823 | 34.6 | 1 |
| Merthyr Tydfil | Emrys Roberts | 7,336 | 22.9 | 2 |
| Monmouth | Ted Spanswick | 930 | 1.5 | 4 |
| Montgomeryshire | A. Jones | 2,274 | 8.3 | 4 |
| Neath | Huw Evans | 8,758 | 21.5 | 2 |
| Newport | P. Cox | 936 | 1.6 | 4 |
| Ogmore | Ted Merriman | 5,139 | 9.6 | 4 |
| Pembrokeshire | R. V. Davies | 2,820 | 4.8 | 4 |
| Pontypool | Roger Tanner | 1,308 | 3.1 | 4 |
| Pontypridd | Richard Anthony Kemp | 4,612 | 8.6 | 4 |
| Rhondda | Glyn James | 6,739 | 12.9 | 2 |
| Swansea East | John Graham Ball | 5,135 | 11.9 | 3 |
| Swansea West | Derrick Hearne | 1,859 | 3.6 | 4 |
| West Flintshire | Gwilym Hughes | 2,296 | 4.4 | 4 |
| Wrexham | H. W. Roberts | 2,624 | 4.5 | 4 |
October 1974 general election
| Constituency | Candidate | Votes | % | Position |
|---|---|---|---|---|
| Aberavon | G. Thomas | 4,032 | 8.5 | 4 |
| Aberdare | Glyn Owen | 8,133 | 21.3 | 2 |
| Abertillery | W. A. Richards | 2,480 | 9.0 | 2 |
| Anglesey | Dafydd Iwan | 6,410 | 19.1 | 3 |
| Barry | Valerie Wynne-Williams | 1,793 | 3.3 | 4 |
| Bedwellty | David Mogford | 3,086 | 8.0 | 4 |
| Brecon and Radnor | Dafydd Noel Gittins | 2,300 | 5.2 | 4 |
| Caernarfon | Dafydd Wigley | 14,624 | 42.6 | 1 |
| Caerphilly | Phil Williams | 10,452 | 24.5 | 2 |
| Cardiff North | P. Richards | 1,464 | 4.6 | 4 |
| Cardiff North West | Colin Palfrey | 1,278 | 3.7 | 4 |
| Cardiff South East | Keith Bush | 983 | 2.4 | 4 |
| Cardiff West | Dafydd Hughes | 2,008 | 5.5 | 4 |
| Cardiganshire | C. Davies | 4,583 | 13.2 | 4 |
| Carmarthen | Gwynfor Evans | 23,325 | 45.1 | 1 |
| Conway | M. Farmer | 4,668 | 11.8 | 4 |
| Denbigh | Ieuan Wyn Jones | 5,754 | 11.9 | 4 |
| East Flintshire | F. Evans | 1,779 | 3.2 | 4 |
| Ebbw Vale | G. Robert | 2,101 | 7.3 | 4 |
| Gower | M. Powell | 4,369 | 10.0 | 4 |
| Llanelli | R. Williams | 6,797 | 13.7 | 3 |
| Merioneth | Dafydd Elis-Thomas | 9,543 | 42.5 | 1 |
| Merthyr Tydfil | Emrys Roberts | 4,455 | 14.8 | 2 |
| Monmouth | T. Brimmacombe | 839 | 1.4 | 4 |
| Montgomeryshire | A. P. Jones | 2,440 | 9.3 | 4 |
| Neath | Huw Evans | 7,305 | 17.9 | 2 |
| Newport | G. Lee | 1,216 | 2.1 | 4 |
| Ogmore | D. I. Jones | 4,290 | 8.4 | 4 |
| Pembrokeshire | R. V. Davies | 2,580 | 4.5 | 4 |
| Pontypool | Roger Tanner | 2,223 | 5.6 | 4 |
| Pontypridd | Richard Anthony Kemp | 3,917 | 7.6 | 4 |
| Rhondda | D. Morgan | 4,173 | 8.3 | 2 |
| Swansea East | John Graham Ball | 3,978 | 9.5 | 4 |
| Swansea West | Guto ap Gwent | 1,778 | 3.6 | 4 |
| West Flintshire | Neil Taylor | 2,306 | 4.8 | 4 |
| Wrexham | H. W. Roberts | 2,859 | 5.1 | 4 |
1979 general election
| Constituency | Candidate | Votes | % | Position |
|---|---|---|---|---|
| Aberavon | G. Thomas | 1,954 | 3.8 | 4 |
| Aberdare | Phil Richards | 3,652 | 9.8 | 3 |
| Abertillery | David Harries | 2,248 | 7.9 | 3 |
| Anglesey | John Lasarus Williams | 7,863 | 20.3 | 3 |
| Barry | John Dixon | 1,281 | 2.1 | 4 |
| Bedwellty | T. Richards | 2,648 | 6.6 | 3 |
| Brecon and Radnor | J. Power | 1,031 | 2.2 | 4 |
| Caernarfon | Dafydd Wigley | 17,420 | 49.7 | 1 |
| Caerphilly | Phil Williams | 6,931 | 14.9 | 3 |
| Cardiff North | Owen John Thomas | 1,081 | 3.0 | 4 |
| Cardiff North West | Colin Palfrey | 743 | 2.1 | 4 |
| Cardiff South East | Eric Roberts | 628 | 1.6 | 3 |
| Cardiff West | A. Ogwen | 3,272 | 10.4 | 2 |
| Cardiganshire | Dafydd Hughes | 5,382 | 14.5 | 4 |
| Carmarthen | Gwynfor Evans | 16,689 | 32.0 | 2 |
| Conway | Emyr Price | 3,497 | 8.6 | 4 |
| Denbigh | Ieuan Wyn Jones | 4,915 | 9.3 | 4 |
| East Flintshire | John Rogers | 1,198 | 2.0 | 4 |
| Ebbw Vale | G. ap Roberts | 1,884 | 6.5 | 4 |
| Gower | Eifion Thomas | 3,357 | 7.2 | 4 |
| Llanelli | Hywel Roberts | 3,793 | 7.4 | 4 |
| Merioneth | Dafydd Elis-Thomas | 9,275 | 40.8 | 1 |
| Merthyr Tydfil | Eurfyl ap Gwilym | 2,962 | 9.4 | 3 |
| Monmouth | G. Williams | 641 | 1.0 | 4 |
| Montgomeryshire | Carl Iwan Clowes | 2,440 | 9.3 | 4 |
| Neath | Aled Gwyn | 6,430 | 15.3 | 3 |
| Newport | Bob Vickery | 473 | 0.8 | 4 |
| Ogmore | D. I. Jones | 2,450 | 4.4 | 4 |
| Pembrokeshire | Ron Dawe | 1,573 | 2.5 | 4 |
| Pontypool | Bill Hyde | 1,169 | 2.6 | 4 |
| Pontypridd | Elfed Roberts | 2,200 | 3.8 | 4 |
| Rhondda | Glyn James | 4,226 | 8.4 | 3 |
| Swansea East | John Graham Ball | 2,732 | 6.0 | 4 |
| Swansea West | Guto ap Gwent | 1,012 | 1.9 | 4 |
| West Flintshire | B. M. Edwards | 1,720 | 3.2 | 4 |
| Wrexham | H. W. Roberts | 1,740 | 2.8 | 4 |
By-elections 1979-1983
| Election | Candidate | Votes | % | Position |
|---|---|---|---|---|
| 1982 Gower by-election | Ieuan Owen | 3,431 | 8.7 | 4 |
1983 general election
| Constituency | Candidate | Votes | % | Position |
|---|---|---|---|---|
| Aberavon | Glenn Phillips | 1,859 | 4.6 | 4 |
| Alyn and Deeside | Alan Shore | 413 | 0.9 | 4 |
| Blaenau Gwent | Stephen Morgan | 1,624 | 3.8 | 4 |
| Brecon and Radnor | Sian Rosmari Meredudd | 640 | 1.7 | 4 |
| Bridgend | Keith Bush | 1,312 | 3.2 | 4 |
| Caernarfon | Dafydd Wigley | 18,308 | 52.7 | 1 |
| Caerphilly | Lindsay Whittle | 6,414 | 13.6 | 4 |
| Cardiff Central | Andrew Paul Morgan | 704 | 1.8 | 4 |
| Cardiff North | Dafydd Huws | 974 | 2.4 | 4 |
| Cardiff South and Penarth | Sian Anghared Edwards | 673 | 1.6 | 4 |
| Cardiff West | Meurig Parri | 848 | 2.1 | 4 |
| Carmarthen | Gwynfor Evans | 14,099 | 27.1 | 3 |
| Ceredigion and Pembroke North | Cynog Dafis | 6,072 | 12.9 | 4 |
| Clwyd North West | Manon Rhys | 1,669 | 3.7 | 4 |
| Clwyd South West | Toni Schiavone | 3,684 | 8.6 | 4 |
| Conwy | Dafydd Iwan | 4,105 | 10.4 | 4 |
| Cynon Valley | Pauline Jarman | 3,421 | 9.3 | 4 |
| Delyn | Haydn Huws | 1,558 | 3.2 | 4 |
| Gower | N. Williams | 1,444 | 3.2 | 4 |
| Islwyn | Aneurin Richards | 1,574 | 4.0 | 4 |
| Llanelli | Hywel Teifi Edwards | 5,880 | 12.2 | 4 |
| Meirionnydd Nant Conwy | Dafydd Elis-Thomas | 9,709 | 39.2 | 1 |
| Merthyr Tydfil and Rhymney | Gerald Howells | 2,058 | 5.8 | 4 |
| Monmouth | Gwynddri Williams | 493 | 1.1 | 4 |
| Montgomeryshire | Carl Iwan Clowes | 1,585 | 5.3 | 4 |
| Neath | Ieuan Owen | 3,046 | 7.2 | 4 |
| Newport East | David Thomas | 697 | 1.7 | 4 |
| Newport West | Denis Watkins | 477 | 1.1 | 4 |
| Ogmore | Ted Merriman | 3,124 | 7.9 | 4 |
| Pembrokeshire | Osi Rhys Osmond | 1,073 | 2.0 | 4 |
| Pontypridd | Janet Marion Davies | 2,065 | 4.7 | 4 |
| Rhondda | Geraint Rhys Davies | 4,845 | 10.2 | 3 |
| Swansea East | C. Reid | 1,531 | 3.7 | 4 |
| Swansea West | Meirion Pennar | 795 | 1.9 | 4 |
| Torfaen | Phyllis Cox | 896 | 2.1 | 4 |
| Vale of Glamorgan | Andrew John Dixon | 1,068 | 2.3 | 4 |
| Wrexham | John Richard Thomas | 1,239 | 2.6 | 4 |
| Ynys Môn | Ieuan Wyn Jones | 13,333 | 33.3 | 2 |
By-elections 1983-1987
| Election | Candidate | Votes | % | Position |
|---|---|---|---|---|
| 1984 Cynon Valley by-election | Clayton Jones | 3,619 | 11.0 | 3 |
| 1985 Brecon and Radnor by-election | Janet Marion Davies | 435 | 1.1 | 4 |
1987 general election
| Constituency | Candidate | Votes | % | Position |
|---|---|---|---|---|
| Aberavon | Anne Louisa Howells | 1,124 | 2.8 | 4 |
| Alyn and Deeside | John Dudley Rogers | 478 | 1.0 | 4 |
| Blaenau Gwent | Stephen Morgan | 1,621 | 3.8 | 4 |
| Brecon and Radnor | John Hamilton Davies | 535 | 1.3 | 4 |
| Bridgend | Laura McAllister | 1,065 | 2.3 | 4 |
| Caernarfon | Dafydd Wigley | 20,338 | 57.1 | 1 |
| Caerphilly | Lindsay Whittle | 3,955 | 8.1 | 4 |
| Cardiff Central | Siân Mair Caiach | 535 | 1.3 | 4 |
| Cardiff North | Eluned Mary Bush | 692 | 1.6 | 4 |
| Cardiff South and Penarth | Sian Anghared Edwards | 599 | 1.3 | 4 |
| Cardiff West | Peter John Keelan | 736 | 1.7 | 4 |
| Carmarthen | Hywel Teifi Edwards | 12,457 | 23.0 | 3 |
| Ceredigion and Pembroke North | Cynog Dafis | 7,848 | 16.3 | 4 |
| Clwyd North West | Robert Karl Davies | 1,966 | 4.0 | 4 |
| Clwyd South West | Eifion Lloyd Jones | 3,987 | 8.4 | 4 |
| Conwy | Rhodri Davies | 3,177 | 7.8 | 4 |
| Cynon Valley | Dorothy Louise Richards | 2,549 | 6.7 | 4 |
| Delyn | David John Owen | 1,329 | 2.5 | 4 |
| Gower | Jonathan Gwyn Mendus Edwards | 1,341 | 2.8 | 4 |
| Islwyn | Aneurin Richards | 1,932 | 4.8 | 4 |
| Llanelli | Adam Price | 5,088 | 10.2 | 4 |
| Meirionnydd Nant Conwy | Dafydd Elis-Thomas | 10,392 | 40.0 | 1 |
| Merthyr Tydfil and Rhymney | Janet Marion Davies | 2,085 | 4.7 | 4 |
| Monmouth | Sian Rosmari Meredudd | 363 | 0.8 | 4 |
| Montgomeryshire | Carl Iwan Clowes | 1,412 | 4.5 | 4 |
| Neath | Huw John | 2,792 | 6.4 | 4 |
| Newport East | Gareth Butler | 458 | 1.1 | 4 |
| Newport West | Digby John Bevan | 377 | 0.8 | 4 |
| Ogmore | John Griffiths Jones | 1,791 | 4.4 | 4 |
| Pembrokeshire | Osi Rhys Osmond | 1,119 | 2.0 | 4 |
| Pontypridd | Delme Bowen | 2,498 | 5.3 | 4 |
| Rhondda | Geraint Rhys Davies | 4,261 | 8.9 | 2 |
| Swansea East | C. Reid | 1,145 | 2.7 | 4 |
| Swansea West | Nigel Williams | 902 | 2.0 | 4 |
| Torfaen | Jill Evans | 577 | 1.3 | 4 |
| Vale of Glamorgan | Penri Gwyn Williams | 946 | 1.8 | 4 |
| Wrexham | Dennis Ronald Watkins | 539 | 1.1 | 4 |
| Ynys Môn | Ieuan Wyn Jones | 18,580 | 43.2 | 1 |
By-elections 1987-1992
| Election | Candidate | Votes | % | Position |
|---|---|---|---|---|
| 1989 Pontypridd by-election | Syd Morgan | 9,775 | 25.3 | 2 |
| 1989 Vale of Glamorgan by-election | Andrew John Dixon | 1,672 | 3.5 | 4 |
| 1991 Neath by-election | Dewi Evans | 8,132 | 23.3 | 2 |
| 1991 Monmouth by-election | Melvin John Witherden | 277 | 0.6 | 5 |
Witherden was a joint candidate with the Green Party of England and Wales.
1992 general election
| Constituency | Candidate | Votes | % | Position |
|---|---|---|---|---|
| Aberavon | David Saunders | 1,919 | 4.8 | 4 |
| Alyn and Deeside | John D. Rogers | 551 | 1.1 | 4 |
| Blaenau Gwent | Alun Davies | 2,099 | 4.8 | 4 |
| Brecon and Radnor | Sian Meredudd | 418 | 0.9 | 4 |
| Bridgend | Alun Lloyd Jones | 1,301 | 2.8 | 4 |
| Caernarfon | Dafydd Wigley | 21,439 | 59.0 | 1 |
| Caerphilly | Lindsay Whittle | 4,821 | 9.7 | 3 |
| Cardiff Central | Huw Marshall | 748 | 1.7 | 4 |
| Cardiff North | Eluned Mary Bush | 916 | 1.9 | 4 |
| Cardiff South and Penarth | Barbara Anglezarke | 776 | 1.6 | 4 |
| Cardiff West | Penni Bestic | 1,177 | 2.6 | 4 |
| Carmarthen | Rhodri Glyn Thomas | 17,957 | 31.5 | 2 |
| Ceredigion and Pembroke North | Cynog Dafis | 16,020 | 31.3 | 1 |
| Clwyd North West | Neil H. Taylor | 1,888 | 3.6 | 4 |
| Clwyd South West | Eifion Lloyd Jones | 4,835 | 9.8 | 4 |
| Conwy | Rhodri Davies | 3,108 | 7.4 | 4 |
| Cynon Valley | Geraint Benney | 4,186 | 11.0 | 3 |
| Delyn | Ashley J. Drake | 1,414 | 2.6 | 4 |
| Gower | Adam Price | 1,658 | 2.8 | 4 |
| Islwyn | Helen Mary Jones | 1,636 | 3.9 | 4 |
| Llanelli | Marc Phillips | 7,878 | 15.6 | 3 |
| Meirionnydd Nant Conwy | Elfyn Llwyd | 11,608 | 44.0 | 1 |
| Merthyr Tydfil and Rhymney | Alun Cox | 2,704 | 6.1 | 4 |
| Monmouth | Melvin Witherden | 431 | 0.9 | 4 |
| Montgomeryshire | Hugh Parsons | 1,581 | 4.8 | 4 |
| Neath | Dewi Evans | 5,145 | 11.3 | 3 |
| Newport East | Stephen Ainley | 716 | 1.7 | 4 |
| Newport West | Peter John Keelan | 653 | 1.4 | 4 |
| Ogmore | Laura McAllister | 2,667 | 6.3 | 4 |
| Pembrokeshire | Conrad Bryant | 1,627 | 2.7 | 4 |
| Pontypridd | Delme Bowen | 4,448 | 9.1 | 3 |
| Rhondda | Geraint Rhys Davies | 5,427 | 11.8 | 2 |
| Swansea East | Eleanor Bonner-Evans | 1,607 | 3.6 | 4 |
| Swansea West | David Lloyd | 1,668 | 3.8 | 4 |
| Torfaen | John Cox | 1,210 | 2.6 | 4 |
| Vale of Glamorgan | David Haswell | 1,160 | 2.1 | 4 |
| Wrexham | Gareth Wheatley | 1,415 | 2.8 | 4 |
| Ynys Môn | Ieuan Wyn Jones | 15,984 | 37.1 | 1 |
By-elections 1992-1997
| Election | Candidate | Votes | % | Position |
|---|---|---|---|---|
| 1995 Islwyn by-election | Jocelyn Davies | 2,933 | 12.7 | 2 |
1997 general election
| Constituency | Candidate | Votes | % | Position |
|---|---|---|---|---|
| Aberavon | Philip Cockwell | 2,088 | 5.8 | 4 |
| Alyn and Deeside | Siw Hills | 738 | 1.8 | 5 |
| Blaenau Gwent | Jim Criddle | 2,072 | 5.2 | 4 |
| Brecon and Radnorshire | Steven Cornelius | 622 | 1.5 | 5 |
| Bridgend | Dennis Watkins | 1,649 | 3.8 | 5 |
| Caerphilly | Lindsay Whittle | 4,383 | 9.7 | 3 |
| Caernarfon | Dafydd Wigley | 17,616 | 51.0 | 1 |
| Cardiff Central | Wayne Vernon | 1,504 | 3.6 | 5 |
| Cardiff North | Colin Palfrey | 1,201 | 2.5 | 4 |
| Cardiff South and Penarth | David Haswell | 1,356 | 3.2 | 5 |
| Cardiff West | Gwenillian Carr | 1,949 | 4.8 | 4 |
| Carmarthen East and Dinefwr | Rhodri Glyn Thomas | 14,457 | 34.6 | 2 |
| Carmarthen West and South Pembrokeshire | Roy Llewellyn | 5,402 | 12.7 | 3 |
| Ceredigion | Cynog Dafis | 16,728 | 41.6 | 1 |
| Clwyd South | Gareth Williams | 2,500 | 6.3 | 4 |
| Clwyd West | Eryl Williams | 5,421 | 13.5 | 3 |
| Conwy | Rhodri Vaughan Davies | 2,844 | 6.8 | 4 |
| Cynon Valley | Alun Davies | 3,552 | 10.6 | 2 |
| Delyn | Ashley J. Drake | 1,558 | 3.8 | 4 |
| Gower | D. Elwyn Williams | 2,226 | 5.1 | 4 |
| Islwyn | Darren Jones | 2,272 | 6.2 | 4 |
| Llanelli | Marc Phillips | 7,812 | 19.0 | 2 |
| Meirionnydd Nant Conwy | Elfyn Llwyd | 12,465 | 50.7 | 1 |
| Merthyr Tydfil | Alun G. Cox | 2,344 | 6.0 | 4 |
| Monmouth | Alan Cotton | 516 | 1.1 | 5 |
| Montgomeryshire | Helen Mary Jones | 1,608 | 5.0 | 4 |
| Neath | Trefor Jones | 3,344 | 8.1 | 3 |
| Newport East | Christopher Holland | 721 | 1.9 | 6 |
| Newport West | Huw Jackson | 648 | 1.6 | 5 |
| Ogmore | John Rogers | 2,679 | 7.0 | 4 |
| Pontypridd | Owain Llewelyn | 2,977 | 6.5 | 4 |
| Preseli Pembrokeshire | Alun Lloyd Jones | 2,683 | 6.3 | 4 |
| Rhondda | Leanne Wood | 5,450 | 13.4 | 2 |
| Swansea East | Michelle Pooley | 1,308 | 3.4 | 4 |
| Swansea West | Dai Lloyd | 2,675 | 6.6 | 4 |
| Torfaen | Robert W. Gough | 1,042 | 2.4 | 5 |
| Vale of Clwyd | Gwyneth Kensler | 2,301 | 5.9 | 4 |
| Vale of Glamorgan | Melanie Corp | 1,393 | 2.6 | 4 |
| Wrexham | Kevin Plant | 1,170 | 3.2 | 5 |
| Ynys Môn | Ieuan Wyn Jones | 15,756 | 39.5 | 1 |
By-elections 1997-2001
| Election | Candidate | Votes | % | Position |
|---|---|---|---|---|
| 2000 Ceredigion by-election | Simon George Thomas | 10,716 | 42.8 | 1 |
2001 general election
| Constituency | Candidate | Votes | % | Position |
|---|---|---|---|---|
| Aberavon | Lisa Turnbull | 2,955 | 9.8 | 2 |
| Alyn and Deeside | Richard Coombs | 1,182 | 3.3 | 4 |
| Blaenau Gwent | Adam John Rykala | 3,542 | 11.2 | 2 |
| Brecon and Radnorshire | Brynach Parri | 1,301 | 3.5 | 4 |
| Bridgend | Monica Emma Mahoney | 2,653 | 7.2 | 4 |
| Caerphilly | Lindsay Whittle | 8,172 | 21.0 | 2 |
| Caernarfon | Hywel Williams | 12,894 | 44.4 | 1 |
| Cardiff Central | Richard Rhys Grigg | 1,680 | 4.8 | 4 |
| Cardiff North | Sion Tomos Jobbins | 2,471 | 5.7 | 4 |
| Cardiff South and Penarth | Lila Eilis Maire Haines | 1,983 | 5.5 | 4 |
| Cardiff West | Delme Bowen | 3,296 | 9.7 | 4 |
| Carmarthen East and Dinefwr | Adam Robert Price | 16,130 | 42.4 | 1 |
| Carmarthen West and South Pembrokeshire | Llyr Huws Gruffydd | 6,893 | 18.7 | 3 |
| Ceredigion | Simon Thomas | 13,241 | 38.3 | 1 |
| Clwyd South | Dyfed Wyn Edwards | 3,982 | 11.9 | 3 |
| Clwyd West | Huw Elfed Williams | 4,453 | 12.9 | 3 |
| Conwy | Ann Owen | 5,665 | 16.5 | 4 |
| Cynon Valley | Steven J. Cornelius | 4,687 | 17.4 | 2 |
| Delyn | Paul John Rowlinson | 2,262 | 6.5 | 4 |
| Gower | Siân Mair Caiach | 3,865 | 10.3 | 4 |
| Islwyn | Leigh Thomas | 3,767 | 11.9 | 3 |
| Llanelli | Dyfan Rhys Jones | 11,183 | 30.9 | 2 |
| Meirionnydd Nant Conwy | Elfyn Llwyd | 10,459 | 49.6 | 1 |
| Merthyr Tydfil | Robert Hughes | 4,651 | 14.7 | 2 |
| Monmouth | Marc Hubbard | 1,068 | 2.4 | 4 |
| Montgomeryshire | David Senior | 1,969 | 6.8 | 4 |
| Neath | Alun Llewelyn | 6,437 | 18.4 | 2 |
| Newport East | Madoc Batcup | 1,519 | 4.9 | 4 |
| Newport West | Anthony Salkeld | 2,510 | 7.2 | 4 |
| Ogmore | Angela Pulman | 4,259 | 14.0 | 2 |
| Pontypridd | Bleddyn Hancock | 5,279 | 13.8 | 2 |
| Preseli Pembrokeshire | Rhys Sinnett | 4,658 | 12.7 | 3 |
| Rhondda | Leanne Wood | 7,183 | 21.1 | 2 |
| Swansea East | John Ball | 3,464 | 11.5 | 4 |
| Swansea West | Ian Titherington | 3,404 | 10.6 | 4 |
| Torfaen | Stephen Paul Smith | 2,720 | 7.7 | 4 |
| Vale of Clwyd | John Williams | 2,300 | 7.1 | 4 |
| Vale of Glamorgan | Chris Franks | 2,867 | 6.3 | 4 |
| Wrexham | Malcolm William Evans | 1,783 | 5.9 | 4 |
| Ynys Môn | Eilian Williams | 11,106 | 32.6 | 2 |
By-elections 2001-2005
| Election | Candidate | Votes | % | Position |
|---|---|---|---|---|
| 2002 Ogmore by-election | Bleddyn Hancock | 3,827 | 20.8 | 2 |
2005 general election
| Constituency | Candidate | Votes | % | Position |
|---|---|---|---|---|
| Aberavon | Philip Evans | 3,545 | 11.8 | 3 |
| Alyn and Deeside | Richard Coombs | 1,320 | 3.7 | 4 |
| Blaenau Gwent | John Price | 843 | 2.4 | 4 |
| Brecon and Radnorshire | Mabon ap Gwynfor | 1,404 | 3.7 | 4 |
| Bridgend | Gareth Clubb | 2,527 | 6.7 | 4 |
| Caerphilly | Lindsay Whittle | 6,831 | 17.4 | 2 |
| Caernarfon | Hywel Williams | 12,747 | 45.5 | 1 |
| Cardiff Central | Richard Rhys Grigg | 1,271 | 3.5 | 4 |
| Cardiff North | John Rowlands | 1,936 | 4.3 | 4 |
| Cardiff South and Penarth | Jason Toby | 2,023 | 5.5 | 4 |
| Cardiff West | Neil McEvoy | 4,316 | 12.5 | 4 |
| Carmarthen East and Dinefwr | Adam Robert Price | 17,561 | 45.9 | 1 |
| Carmarthen West and South Pembrokeshire | John Dixon | 5,582 | 14.7 | 3 |
| Ceredigion | Simon Thomas | 12,911 | 35.9 | 2 |
| Clwyd South | Mark Strong | 3,111 | 9.4 | 4 |
| Clwyd West | Eilian Williams | 3,874 | 10.9 | 4 |
| Conwy | Paul Rowlinson | 3,730 | 11.1 | 4 |
| Cynon Valley | Geraint Benney | 3,815 | 14.3 | 2 |
| Delyn | Phil Thomas | 2,524 | 7.4 | 4 |
| Gower | Siân Mair Caiach | 3,089 | 7.8 | 4 |
| Islwyn | Jim Criddle | 3,947 | 12.8 | 2 |
| Llanelli | Neil Baker | 9,358 | 26.5 | 2 |
| Meirionnydd Nant Conwy | Elfyn Llwyd | 10,597 | 51.3 | 1 |
| Merthyr Tydfil | Noel Turner | 2,972 | 9.9 | 4 |
| Monmouth | Jonathan Clark | 993 | 2.2 | 4 |
| Montgomeryshire | Ellen ap Gwynn | 2,078 | 6.9 | 4 |
| Neath | Geraint Owen | 6,125 | 17.1 | 2 |
| Newport East | Mohammad Asghar | 1,221 | 3.8 | 4 |
| Newport West | Anthony Salkeld | 1,278 | 3.6 | 4 |
| Ogmore | John Williams | 3,148 | 10.4 | 4 |
| Pontypridd | Julie Richards | 4,420 | 11.2 | 4 |
| Preseli Pembrokeshire | Matt Mathias | 4,752 | 12.3 | 4 |
| Rhondda | Percy Jones | 4,956 | 15.9 | 2 |
| Swansea East | Carolyn Shan Couch | 2,129 | 6.9 | 4 |
| Swansea West | Harri Roberts | 2,150 | 6.5 | 4 |
| Torfaen | Aneurin Preece | 2,242 | 6.2 | 4 |
| Vale of Clwyd | Mark Jones | 2,309 | 7.1 | 4 |
| Vale of Glamorgan | Barry Shaw | 2,423 | 5.1 | 4 |
| Wrexham | Sion Owen | 1,744 | 5.7 | 4 |
| Ynys Môn | Eurig Wyn | 11,036 | 31.1 | 2 |
By-elections 2005-2010
| Election | Candidate | Votes | % | Position |
|---|---|---|---|---|
| 2006 Blaenau Gwent by-election | Steffan Lewis | 1,755 | 6.5 | 3 |
2010 general election
| Constituency | Candidate | Votes | % | Position |
|---|---|---|---|---|
| Aberavon | Paul Nicholls-Jones | 2,198 | 7.1 | 4 |
| Aberconwy | Phil Edwards | 5,341 | 17.8 | 4 |
| Alyn and Deeside | Maurice Jones | 1,549 | 3.9 | 4 |
| Arfon | Hywel Williams | 9,383 | 36.0 | 1 |
| Blaenau Gwent | Rhodri Davies | 1,333 | 4.1 | 5 |
| Brecon and Radnorshire | Janet Davies | 989 | 2.5 | 4 |
| Bridgend | Nicholas Thomas | 2,269 | 5.9 | 4 |
| Caerphilly | Lindsay Whittle | 6,460 | 16.7 | 3 |
| Cardiff Central | Chris Williams | 1,246 | 3.4 | 4 |
| Cardiff North | Llewelyn Rhys | 1,588 | 3.3 | 4 |
| Cardiff South and Penarth | Farida Aslam | 1,851 | 4.2 | 4 |
| Cardiff West | Mohammad Sarul Islam | 2,868 | 7.0 | 4 |
| Carmarthen East and Dinefwr | Jonathan Edwards | 13,546 | 35.6 | 1 |
| Carmarthen West and South Pembrokeshire | John Dixon | 4,232 | 10.4 | 4 |
| Ceredigion | Penri James | 10,815 | 28.3 | 2 |
| Clwyd South | Janet Ryder | 3,009 | 8.7 | 4 |
| Clwyd West | Llyr Huws Gruffydd | 5,864 | 15.4 | 3 |
| Cynon Valley | Dafydd Trystan Davies | 6,064 | 20.3 | 2 |
| Delyn | Peter Ryder | 1,844 | 5.0 | 4 |
| Dwyfor Meirionydd | Elfyn Llwyd | 12,814 | 44.3 | 1 |
| Gower | Darren Price | 2,760 | 6.6 | 4 |
| Islwyn | Steffan Lewis | 4,518 | 13.0 | 3 |
| Llanelli | Myfanwy Davies | 11,215 | 29.9 | 2 |
| Merthyr Tydfil | Glyndwr Jones | 1,621 | 5.1 | 5 |
| Monmouth | Jonathan Clark | 1,273 | 2.7 | 4 |
| Montgomeryshire | Heledd Fychan | 2,802 | 8.3 | 3 |
| Neath | Alun Llewelyn | 7,397 | 19.9 | 2 |
| Newport East | Fiona Cross | 724 | 2.1 | 5 |
| Newport West | Jeff Rees | 1,122 | 2.8 | 6 |
| Ogmore | Danny Clark | 3,326 | 9.6 | 4 |
| Pontypridd | Ioan Bellin | 2,673 | 7.3 | 4 |
| Preseli Pembrokeshire | Henry Jones-Davies | 3,654 | 9.2 | 4 |
| Rhondda | Geraint Davies | 5,630 | 18.1 | 2 |
| Swansea East | Dic Jones | 2,181 | 6.7 | 4 |
| Swansea West | Harri Roberts | 1,437 | 4.0 | 4 |
| Torfaen | Rhys ab Elis | 2,005 | 5.3 | 4 |
| Vale of Clwyd | Caryl Wyn-Jones | 2,068 | 5.8 | 4 |
| Vale of Glamorgan | Ian James Johnson | 2,667 | 5.5 | 4 |
| Wrexham | Arfon Jones | 2,029 | 6.2 | 4 |
| Ynys Môn | Dylan Rees | 9,029 | 26.2 | 2 |
By-elections 2010-2015
| Election | Candidate | Votes | % | Position |
|---|---|---|---|---|
| 2012 Cardiff South and Penarth by-election | Luke Nicholas | 1,854 | 9.5 | 4 |
2015 general election
| Constituency | Candidate | Votes | % | Position |
|---|---|---|---|---|
| Aberavon | Duncan Higgitt | 3,663 | 11.6 | 4 |
| Aberconwy | Dafydd Meurig | 3,536 | 11.7 | 3 |
| Alyn and Deeside | Jacqueline Ann Hurst | 1,608 | 3.9 | 5 |
| Arfon | Hywel Williams | 11,790 | 43.9 | 1 |
| Blaenau Gwent | Steffan Lewis | 2,849 | 9.0 | 4 |
| Brecon and Radnorshire | Freddy Greaves | 1,767 | 4.4 | 5 |
| Bridgend | James Christopher Radcliffe | 2,784 | 7.1 | 4 |
| Caerphilly | Beci Newton | 5,895 | 14.6 | 4 |
| Cardiff Central | Martin Pollard | 1,925 | 5.0 | 6 |
| Cardiff North | Elin Walker Jones | 2,301 | 4.5 | 4 |
| Cardiff South and Penarth | Ben Foday | 3,433 | 7.4 | 4 |
| Cardiff West | Neil McEvoy | 6,096 | 13.9 | 3 |
| Carmarthen East and Dinefwr | Jonathan Edwards | 15,140 | 38.4 | 1 |
| Carmarthen West and South Pembrokeshire | Elwyn Williams | 4,201 | 10.4 | 4 |
| Ceredigion | Mike Parker | 10,347 | 27.7 | 2 |
| Clwyd South | Mabon ap Gwynfor | 3,620 | 10.3 | 4 |
| Clwyd West | Marc Jones | 4,651 | 12.2 | 4 |
| Cynon Valley | Cerith Griffiths | 5,126 | 16.8 | 2 |
| Delyn | Paul Rowlinson | 1,803 | 4.8 | 4 |
| Dwyfor Meirionydd | Liz Saville-Roberts | 11,811 | 40.9 | 1 |
| Gower | Darren Thomas | 3,051 | 7.1 | 4 |
| Islwyn | Lyn Ackerman | 3,794 | 10.7 | 4 |
| Llanelli | Vaughan Williams | 8,853 | 23.0 | 2 |
| Merthyr Tydfil | Rhayna Pritchard | 3,099 | 9.5 | 4 |
| Monmouth | Jonathan Clark | 1,875 | 3.9 | 5 |
| Montgomeryshire | Ann Griffith | 1,745 | 5.2 | 5 |
| Neath | Daniel Thomas | 6,722 | 18.1 | 2 |
| Newport East | Tony Salkeld | 1,231 | 3.5 | 5 |
| Newport West | Simon Coopey | 1,604 | 4.0 | 4 |
| Ogmore | Tim Thomas | 3,556 | 10.1 | 4 |
| Pontypridd | Osian Lewis | 4,348 | 11.5 | 5 |
| Preseli Pembrokeshire | John Osmond | 2,518 | 6.2 | 5 |
| Rhondda | Shelley Rees-Owen | 8,521 | 27.0 | 2 |
| Swansea East | Dic Jones | 3,498 | 10.4 | 4 |
| Swansea West | Harri Roberts | 2,266 | 6.4 | 5 |
| Torfaen | Boydd Hackley-Green | 2,169 | 5.7 | 4 |
| Vale of Clwyd | Mair Rowlands | 2,486 | 7.1 | 4 |
| Vale of Glamorgan | Ian James Johnson | 2,869 | 5.6 | 4 |
| Wrexham | Carrie Harper | 2,501 | 7.6 | 4 |
| Ynys Môn | John Rowlands | 10,642 | 30.5 | 2 |
By-elections 2015-2017
| Election | Candidate | Votes | % | Position |
|---|---|---|---|---|
| 2016 Ogmore by-election | Abi Thomas | 3,683 | 15.7 | 3 |
2017 general election
| Constituency | Candidate | Votes | % | Position |
|---|---|---|---|---|
| Aberavon | Andrew Bennison | 2,761 | 8.3 | 3 |
| Aberconwy | Wyn Elis Jones | 3,170 | 9.9 | 3 |
| Alyn and Deeside | Jacqueline Ann Hurst | 1,171 | 2.6 | 3 |
| Arfon | Hywel Williams | 11,519 | 40.8 | 1 |
| Blaenau Gwent | Nigel Copner | 6,880 | 21.2 | 2 |
| Brecon and Radnorshire | Kate Heneghan | 1,299 | 3.1 | 4 |
| Bridgend | Rhys Watkins | 1,783 | 4.1 | 3 |
| Caerphilly | Lindsay Whittle | 5,962 | 14.4 | 3 |
| Cardiff Central | Mark Hooper | 999 | 2.5 | 4 |
| Cardiff North | Steffan Webb | 1,738 | 3.3 | 3 |
| Cardiff South and Penarth | Ian Titherington | 2,162 | 4.3 | 3 |
| Cardiff West | Michael Deem | 4,418 | 9.5 | 3 |
| Carmarthen East and Dinefwr | Jonathan Edwards | 16,127 | 39.3 | 1 |
| Carmarthen West and South Pembrokeshire | Abi Thomas | 3,933 | 9.3 | 3 |
| Ceredigion | Ben Lake | 11,623 | 29.2 | 1 |
| Clwyd South | Christopher Allen | 2,292 | 6.1 | 3 |
| Clwyd West | Dilwyn Roberts | 3,918 | 9.6 | 3 |
| Cynon Valley | Liz Walters | 4,376 | 13.8 | 3 |
| Delyn | Paul Rowlinson | 1,481 | 3.8 | 3 |
| Dwyfor Meirionydd | Liz Saville-Roberts | 13,687 | 45.1 | 1 |
| Gower | Harri Roberts | 1,669 | 3.7 | 3 |
| Islwyn | Darren Jones | 2,739 | 7.6 | 3 |
| Llanelli | Mari Arthur | 7,351 | 18.2 | 3 |
| Merthyr Tydfil and Rhymney | Amy Kitcher | 2,740 | 8.2 | 3 |
| Monmouth | Carole Damon | 1,338 | 2.7 | 4 |
| Montgomeryshire | Aled Hughes | 1,960 | 5.6 | 4 |
| Neath | Daniel Williams | 5,339 | 13.9 | 3 |
| Newport East | Cameron Wixcey | 881 | 2.4 | 5 |
| Newport West | Morgan Bowler-Brown | 1,077 | 2.5 | 4 |
| Ogmore | Huw Marshall | 2,796 | 7.5 | 3 |
| Pontypridd | Fflur Elin | 4,102 | 10.3 | 3 |
| Preseli Pembrokeshire | Owain Llŷr Williams | 2,711 | 6.4 | 3 |
| Rhondda | Branwen Cennard | 7,350 | 22.3 | 2 |
| Swansea East | Steffan Phillips | 1,689 | 4.8 | 3 |
| Swansea West | Rhydian Fitter | 1,529 | 4.1 | 3 |
| Torfaen | Jeff Rees | 2,059 | 5.4 | 3 |
| Vale of Clwyd | David Wyatt | 1,551 | 4.0 | 3 |
| Vale of Glamorgan | Ian Johnson | 2,295 | 4.3 | 3 |
| Wrexham | Carrie Harper | 1,753 | 5.0 | 3 |
| Ynys Môn | Ieuan Wyn Jones | 10,237 | 27.4 | 3 |
By-elections 2017-2019
| Election | Candidate | Votes | % | Position |
|---|---|---|---|---|
| 2019 Newport West by-election | Jonathan Clarke | 1,185 | 5.0 | 4 |
2019 general election
| Constituency | Candidate | Votes | % | Position |
|---|---|---|---|---|
| Aberavon | Nigel Hunt | 2,711 | 8.6 | 4 |
| Aberconwy | Lisa Goodier | 2,704 | 8.5 | 3 |
| Alyn and Deeside | Susan Hills | 1,453 | 3.4 | 5 |
| Arfon | Hywel Williams | 13,134 | 45.2 | 1 |
| Blaenau Gwent | Peredur Owen Griffiths | 1,722 | 5.7 | 4 |
| Bridgend | Leanne Lewis | 2,013 | 4.8 | 4 |
| Caerphilly | Lindsay Whittle | 6,424 | 16.0 | 3 |
| Cardiff North | Rhys Taylor | 3,580 | 6.8 | 3 |
| Cardiff South and Penarth | Nasir Adam | 2,386 | 4.7 | 4 |
| Cardiff West | Boyd Clack | 3,864 | 8.4 | 3 |
| Carmarthen East and Dinefwr | Jonathan Edwards | 15,939 | 38.9 | 1 |
| Carmarthen West and South Pembrokeshire | Rhys Thomas | 3,633 | 8.6 | 3 |
| Ceredigion | Ben Lake | 15,208 | 37.9 | 1 |
| Clwyd South | Christopher Allen | 2,137 | 5.9 | 3 |
| Clwyd West | Elfed Williams | 3,907 | 9.7 | 3 |
| Cynon Valley | Geraint Benney | 2,562 | 8.5 | 4 |
| Delyn | Paul Rowlinson | 1,406 | 3.7 | 5 |
| Dwyfor Meirionydd | Liz Saville-Roberts | 14,447 | 48.3 | 1 |
| Gower | John Davies | 2,288 | 5.1 | 3 |
| Islwyn | Zoe Hammond | 2,287 | 6.7 | 4 |
| Llanelli | Mari Arthur | 7,048 | 18.4 | 3 |
| Merthyr Tydfil and Rhymney | Mark Evans | 2,449 | 7.6 | 4 |
| Monmouth | Hugh Kocan | 1,182 | 2.4 | 5 |
| Neath | Daniel Williams | 4,495 | 12.2 | 3 |
| Newport East | Cameron Wixcey | 872 | 2.4 | 5 |
| Newport West | Morgan Bowler-Brown | 1,187 | 2.7 | 5 |
| Ogmore | Luke Fletcher | 2,919 | 8.3 | 4 |
| Pontypridd | Fflur Elin | 4,990 | 12.8 | 3 |
| Preseli Pembrokeshire | Cris Tomos | 2,776 | 6.5 | 3 |
| Rhondda | Branwen Cennard | 4,069 | 13.7 | 3 |
| Swansea East | Geraint Havard | 1,907 | 5.7 | 4 |
| Swansea West | Gwyn Williams | 1,984 | 5.5 | 4 |
| Torfaen | Morgan Bowler-Brown | 1,441 | 3.9 | 4 |
| Vale of Clwyd | Glenn Swingler | 1,552 | 4.2 | 3 |
| Wrexham | Carrie Harper | 2,151 | 6.4 | 3 |
| Ynys Môn | Aled ap Dafydd | 10,418 | 28.5 | 3 |
References
- Craig, F. W. S. (1968). British Parliamentary Election Statistics 1918-1968. Glasgow: Political Reference Publications. p. 46. ISBN 0900178000.
- F. W. S. Craig, Chronology of British Parliamentary By-elections 1833-1987
- F. W. S. Craig, British parliamentary election results 1918–1949 (3 ed.). Chichester: Parliamentary Research Services. ISBN 0-900178-06-X
- F. W. S. Craig, British parliamentary election results 1950–1973 (2 ed.). Chichester: Parliamentary Research Services. ISBN 0-900178-07-8
- F. W. S. Craig, British parliamentary election results, 1974–1983. Chichester: Parliamentary Research Services. ISBN 0-900178-23-X
- C. Rallings & M. Thrasher, British Parliamentary Election Results 1983-1997, (Aldershot: Ashgate, 1999)
- C. Rallings & M. Thrasher, Britain Votes 6, (Aldershot: Ashgate 1998)
- Electoral Commission, Compiled by Colin Rallings & Michael Thrasher, Election 2001 - The Official Results, (London: Politicos, 2001)
- Beti Jones, Etholiadau'r ganrif (in Welsh)
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