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 |
| Carmarthen East and Dinefwr | EDWARDS, Jonathan | 57,419 | 71.4% | 15,939 | 38.9% | -0.4% | 1st |
| Ceredigion | LAKE, Ben | 56,386 | 71.1% | 15,208 | 37.9% | 8.7% | 1st |
| Dwyfor Meirionnydd | SAVILLE ROBERTS, Liz | 44,362 | 67.5% | 14,447 | 48.3% | 3.2% | 1st |
| Arfon | WILLIAMS, Hywel | 42,215 | 68.9% | 13,134 | 45.2% | 4.3% | 1st |
| Ynys Môn | AP DAFYDD, Aled | 51,925 | 70.4% | 10,418 | 28.5% | 1.1% | 3rd |
| 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 |
| 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 |
| Rhondda | CENNARD, Branwen | 50,262 | 59.0% | 4,069 | 13.7% | -8.6% | 3rd |
| Clwyd West | WILLIAMS, Elfed | 57,714 | 69.7% | 3,907 | 9.7% | 0.1% | 3rd |
| Cardiff West | CLACK, Boyd | 68,508 | 67.4% | 3,864 | 8.4% | -1.1% | 3rd |
| Carmarthen West and South Pembrokeshire | THOMAS, Glanville | 59,158 | 71.2% | 3,633 | 8.6% | -0.7% | 3rd |
| Ogmore | FLETCHER, Luke | 57,581 | 61.5% | 2,919 | 8.2% | 0.7% | 4th |
| Preseli Pembrokeshire | TOMOS, Cris | 59,606 | 71.2% | 2,776 | 6.5% | 0.1% | 3rd |
| 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 |
| Cynon Valley | BENNEY, Geraint | 51,134 | 59.1% | 2,562 | 8.5% | -5.3% | 4th |
| Merthyr Tydfil and Rhymney | EVANS, Mark | 56,322 | 57.3% | 2,446 | 7.6% | -0.6% | 4th |
| Cardiff South and Penarth | ADAM, Nasir | 78,837 | 64.2% | 2,386 | 4.7% | 0.5% | 4th |
| 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 |
| Wrexham | HARPER, Carrie | 49,737 | 67.4% | 2,151 | 6.4% | 1.4% | 3rd |
| Clwyd South | ALLEN, Chris | 53,919 | 67.3% | 2,137 | 5.9% | -0.2% | 3rd |
| Bridgend | LEWIS, Leanne | 63,303 | 66.7% | 2,013 | 4.8% | 0.6% | 4th |
| Swansea West | WILLIAMS, Gwyn | 57,078 | 62.8% | 1,984 | 5.5% | 1.4% | 4th |
| Swansea East | HAVARD, Geraint | 58,450 | 57.4% | 1,905 | 5.7% | 0.9% | 4th |
| Blaenau Gwent | OWEN GRIFFITHS, Peredur | 50,739 | 59.6% | 1,722 | 5.7% | -15.5% | 4th |
| Cardiff North | WEBB, Steffan | 68,438 | 77.0% | 1,606 | 3.0% | -0.3% | 4th |
| Vale of Clwyd | SWINGLER, Glenn | 56,649 | 65.7% | 1,552 | 4.2% | 0.2% | 3rd |
| Alyn and Deeside | HILLS, Susan | 62,789 | 68.5% | 1,453 | 3.4% | 0.8% | 5th |
| Torfaen | BOWLER-BROWN, Morgan | 62,330 | 59.6% | 1,441 | 3.9% | -1.5% | 5th |
| Delyn | ROWLINSON, Paul | 54,560 | 70.3% | 1,406 | 3.7% | -0.1% | 5th |
| Newport West | CLARK, Jonathan | 66,657 | 65.2% | 1,187 | 2.7% | 0.3% | 5th |
| Monmouth | KOCAN, Hugh | 67,098 | 74.8% | 1,182 | 2.4% | -0.3% | 5th |
| Newport East | WIXCEY, Cameron | 58,554 | 62.0% | 872 | 2.4% | 0.0% | 5th |
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.