A general election to the 57th Parliament of the United Kingdom with an electorate of 46,836,533, having 32,204,184 valid votes and 74,188 invalid votes.
Read the House of Commons Library briefing.
Elections contested - Elections won
| Constituency | Candidate | Electorate | Turnout | Votes | Vote share | Vote change | Position |
| Aberavon | KINNOCK, Stephen | 49,892 | 66.7% | 22,662 | 68.1% | 19.2% | 1st |
| Aberconwy | OWEN, Emily | 45,251 | 71.0% | 13,702 | 42.6% | 14.4% | 2nd |
| Alyn and Deeside | TAMI, Mark | 63,013 | 71.0% | 23,315 | 52.1% | 12.1% | 1st |
| Arfon | GRIFFITHS CLARKE, Mary | 41,367 | 68.2% | 11,427 | 40.5% | 10.2% | 2nd |
| Blaenau Gwent | SMITH, Nick | 51,227 | 63.2% | 18,787 | 58.0% | 0.0% | 1st |
| Brecon and Radnorshire | LODGE, Dan | 56,010 | 73.8% | 7,335 | 17.7% | 3.0% | 3rd |
| Bridgend | MOON, Madeleine | 62,185 | 69.6% | 21,913 | 50.7% | 13.6% | 1st |
| Caerphilly | DAVID, Wayne | 64,381 | 64.1% | 22,491 | 54.5% | 10.1% | 1st |
| Cardiff Central | STEVENS, Jo | 59,288 | 68.1% | 25,193 | 62.4% | 22.4% | 1st |
| Cardiff North | MCMORRIN, Anna | 67,221 | 77.4% | 26,081 | 50.1% | 11.9% | 1st |
| Cardiff South and Penarth | DOUGHTY, Stephen | 76,499 | 66.3% | 30,182 | 59.5% | 16.7% | 1st |
| Cardiff West | BRENNAN, Kevin | 66,775 | 69.8% | 26,425 | 56.7% | 16.0% | 1st |
| Carmarthen East and Dinefwr | DARKIN, David | 55,976 | 73.3% | 12,219 | 29.8% | 5.6% | 2nd |
| Carmarthen West and South Pembrokeshire | TIERNEY, Marc | 58,565 | 72.1% | 16,661 | 39.5% | 10.8% | 2nd |
| Ceredigion | MULHOLLAND, Dinah | 54,262 | 73.3% | 8,017 | 20.2% | 10.5% | 3rd |
| Clwyd South | JONES, Susan Elan | 53,729 | 69.7% | 19,002 | 50.7% | 13.5% | 1st |
| Clwyd West | THOMAS, Gareth | 58,263 | 69.8% | 16,104 | 39.6% | 14.0% | 2nd |
| Cynon Valley | CLWYD, Ann | 51,334 | 62.0% | 19,404 | 61.0% | 13.3% | 1st |
| Delyn | HANSON, David | 54,090 | 72.9% | 20,573 | 52.2% | 11.6% | 1st |
| Dwyfor Meirionnydd | NORMAN, Mathew | 44,699 | 67.9% | 6,273 | 20.7% | 7.2% | 3rd |
| Gower | ANTONIAZZI, Tonia | 62,163 | 73.3% | 22,727 | 49.9% | 12.8% | 1st |
| Islwyn | EVANS, Chris | 56,256 | 64.2% | 21,238 | 58.8% | 9.9% | 1st |
| Llanelli | GRIFFITH, Nia | 59,434 | 67.9% | 21,568 | 53.5% | 12.1% | 1st |
| Merthyr Tydfil and Rhymney | JONES, Gerald | 55,463 | 60.5% | 22,407 | 66.8% | 12.9% | 1st |
| Monmouth | JONES, Ruth | 64,909 | 76.6% | 18,205 | 36.6% | 9.8% | 2nd |
| Montgomeryshire | JONES, Iwan Wyn | 50,755 | 68.7% | 5,542 | 15.9% | 10.3% | 3rd |
| Neath | REES, Christina | 55,862 | 68.5% | 21,713 | 56.7% | 12.9% | 1st |
| Newport East | MORDEN, Jessica | 57,233 | 64.3% | 20,804 | 56.5% | 15.8% | 1st |
| Newport West | FLYNN, Paul | 64,399 | 67.5% | 22,723 | 52.3% | 11.1% | 1st |
| Ogmore | ELMORE, Chris | 57,125 | 65.1% | 23,225 | 62.4% | 9.5% | 1st |
| Pontypridd | SMITH, Owen | 60,564 | 65.9% | 22,103 | 55.4% | 14.3% | 1st |
| Preseli Pembrokeshire | THOMPSON, Philippa | 58,554 | 72.1% | 17,988 | 42.6% | 14.5% | 2nd |
| Rhondda | BRYANT, Chris | 50,514 | 65.2% | 21,096 | 64.1% | 13.4% | 1st |
| Swansea East | HARRIS, Carolyn | 58,521 | 60.1% | 22,307 | 63.4% | 10.5% | 1st |
| Swansea West | DAVIES, Geraint | 56,892 | 65.5% | 22,278 | 59.8% | 17.2% | 1st |
| Torfaen | THOMAS-SYMONDS, Nick | 61,839 | 62.1% | 22,134 | 57.6% | 12.9% | 1st |
| Vale Of Clwyd | RUANE, Chris | 56,890 | 68.0% | 19,423 | 50.2% | 11.9% | 1st |
| Vale Of Glamorgan | BEAVEN, Camilla | 73,959 | 72.6% | 23,311 | 43.4% | 10.8% | 2nd |
| Wrexham | LUCAS, Ian | 49,881 | 70.4% | 17,153 | 48.9% | 11.7% | 1st |
| Ynys Môn | OWEN, Albert | 52,921 | 70.6% | 15,643 | 41.9% | 10.7% | 1st |
Turnout as calculated by the House of Commons Library, is the total number of votes cast and not spoiled, divided by the size of the electorate.
Under section 13(b) of the Representation of the People Act 1985, a candidate gaining 5% or less of the vote share will forfeit their deposit.