Results for the UK general election on 12 December 2019 Elections contested by Plaid Cymru
A general election to the 58th Parliament of the United Kingdom with an electorate of 47,562,702, having 32,014,110 valid votes and 117,919 invalid votes.
Read the House of Commons Library briefing.
| Constituency | Candidate | Electorate | Turnout | Votes | Vote share | Vote change | Position |
| Merthyr Tydfil and Rhymney | EVANS, Mark | 56,322 | 57.3% | 2,446 | 7.6% | -0.6% | 4th |
| Swansea East | HAVARD, Geraint | 58,450 | 57.4% | 1,905 | 5.7% | 0.9% | 4th |
| Rhondda | CENNARD, Branwen | 50,262 | 59.0% | 4,069 | 13.7% | -8.6% | 3rd |
| Cynon Valley | BENNEY, Geraint | 51,134 | 59.1% | 2,562 | 8.5% | -5.3% | 4th |
| Blaenau Gwent | OWEN GRIFFITHS, Peredur | 50,739 | 59.6% | 1,722 | 5.7% | -15.5% | 4th |
| Torfaen | BOWLER-BROWN, Morgan | 62,330 | 59.6% | 1,441 | 3.9% | -1.5% | 5th |
| Ogmore | FLETCHER, Luke | 57,581 | 61.5% | 2,919 | 8.2% | 0.7% | 4th |
| Newport East | WIXCEY, Cameron | 58,554 | 62.0% | 872 | 2.4% | 0.0% | 5th |
| Islwyn | HAMMOND, Zoe | 55,423 | 62.0% | 2,286 | 6.7% | -0.9% | 4th |
| Aberavon | HUNT, Nigel | 50,750 | 62.3% | 2,711 | 8.6% | 0.3% | 4th |
| Swansea West | WILLIAMS, Gwyn | 57,078 | 62.8% | 1,984 | 5.5% | 1.4% | 4th |
| Llanelli | ARTHUR, Mari | 60,518 | 63.2% | 7,048 | 18.4% | 0.2% | 3rd |
| Caerphilly | WHITTLE, Lindsay | 63,166 | 63.5% | 6,424 | 16.0% | 1.6% | 3rd |
| Cardiff South and Penarth | ADAM, Nasir | 78,837 | 64.2% | 2,386 | 4.7% | 0.5% | 4th |
| Pontypridd | ELIN, Fflur | 60,327 | 64.7% | 4,990 | 12.8% | 2.5% | 3rd |
| Neath | WILLIAMS, Daniel | 56,419 | 65.1% | 4,495 | 12.2% | -1.7% | 3rd |
| Newport West | CLARK, Jonathan | 66,657 | 65.2% | 1,187 | 2.7% | 0.3% | 5th |
| Vale of Clwyd | SWINGLER, Glenn | 56,649 | 65.7% | 1,552 | 4.2% | 0.2% | 3rd |
| Bridgend | LEWIS, Leanne | 63,303 | 66.7% | 2,013 | 4.8% | 0.6% | 4th |
| Clwyd South | ALLEN, Chris | 53,919 | 67.3% | 2,137 | 5.9% | -0.2% | 3rd |
| Cardiff West | CLACK, Boyd | 68,508 | 67.4% | 3,864 | 8.4% | -1.1% | 3rd |
| Wrexham | HARPER, Carrie | 49,737 | 67.4% | 2,151 | 6.4% | 1.4% | 3rd |
| Dwyfor Meirionnydd | SAVILLE ROBERTS, Liz | 44,362 | 67.5% | 14,447 | 48.3% | 3.2% | 1st |
| Alyn and Deeside | HILLS, Susan | 62,789 | 68.5% | 1,453 | 3.4% | 0.8% | 5th |
| Arfon | WILLIAMS, Hywel | 42,215 | 68.9% | 13,134 | 45.2% | 4.3% | 1st |
| Clwyd West | WILLIAMS, Elfed | 57,714 | 69.7% | 3,907 | 9.7% | 0.1% | 3rd |
| Delyn | ROWLINSON, Paul | 54,560 | 70.3% | 1,406 | 3.7% | -0.1% | 5th |
| Ynys Môn | AP DAFYDD, Aled | 51,925 | 70.4% | 10,418 | 28.5% | 1.1% | 3rd |
| Ceredigion | LAKE, Ben | 56,386 | 71.1% | 15,208 | 37.9% | 8.7% | 1st |
| Preseli Pembrokeshire | TOMOS, Cris | 59,606 | 71.2% | 2,776 | 6.5% | 0.1% | 3rd |
| Carmarthen West and South Pembrokeshire | THOMAS, Glanville | 59,158 | 71.2% | 3,633 | 8.6% | -0.7% | 3rd |
| Aberconwy | GOODIER, Lisa | 44,699 | 71.3% | 2,704 | 8.5% | -1.4% | 3rd |
| Carmarthen East and Dinefwr | EDWARDS, Jonathan | 57,419 | 71.4% | 15,939 | 38.9% | -0.4% | 1st |
| Gower | DAVIES, John | 61,762 | 72.0% | 2,288 | 5.1% | 1.5% | 3rd |
| Monmouth | KOCAN, Hugh | 67,098 | 74.8% | 1,182 | 2.4% | -0.3% | 5th |
| Cardiff North | WEBB, Steffan | 68,438 | 77.0% | 1,606 | 3.0% | -0.3% | 4th |
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.