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