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