Results for the UK general election on 7 May 2015 Elections contested by Plaid Cymru
A general election to the 56th Parliament of the United Kingdom with an electorate of 46,354,197, having 30,697,525 valid votes and 102,639 invalid votes.
Read the House of Commons Library briefing.
| Constituency | Candidate | Electorate | Turnout | Votes | Vote share | Vote change | Position |
| Arfon | WILLIAMS, Hywel | 40,492 | 66.3% | 11,790 | 43.9% | 8.0% | 1st |
| Dwyfor Meirionnydd | SAVILLE-ROBERTS, Liz | 44,394 | 65.1% | 11,811 | 40.9% | -3.5% | 1st |
| Carmarthen East and Dinefwr | EDWARDS, Jonathan | 55,750 | 70.7% | 15,140 | 38.4% | 2.8% | 1st |
| Ynys Môn | ROWLANDS, John | 49,939 | 69.9% | 10,642 | 30.5% | 4.3% | 2nd |
| Ceredigion | PARKER, Mike | 54,242 | 69.0% | 10,347 | 27.7% | -0.6% | 2nd |
| Rhondda | REES-OWEN, Shelley | 51,811 | 60.9% | 8,521 | 27.0% | 8.9% | 2nd |
| Llanelli | WILLIAMS, Vaughan | 59,314 | 65.0% | 8,853 | 23.0% | -7.0% | 2nd |
| Neath | THOMAS, Daniel | 56,097 | 66.2% | 6,722 | 18.1% | -1.8% | 2nd |
| Cynon Valley | GRIFFITHS, Cerith | 51,422 | 59.3% | 5,126 | 16.8% | -3.5% | 2nd |
| Caerphilly | NEWTON, Beci | 63,603 | 63.3% | 5,895 | 14.6% | -2.1% | 4th |
| Cardiff West | MCEVOY, Neil | 66,762 | 65.6% | 6,096 | 13.9% | 6.9% | 3rd |
| Clwyd West | JONES, Marc | 58,644 | 64.8% | 4,651 | 12.2% | -3.2% | 4th |
| Aberconwy | MEURIG, Dafydd | 45,525 | 66.2% | 3,536 | 11.7% | -6.1% | 3rd |
| Aberavon | HIGGITT, Duncan | 49,821 | 63.3% | 3,663 | 11.6% | 4.5% | 4th |
| Pontypridd | LEWIS, Osian | 58,940 | 64.3% | 4,348 | 11.5% | 4.2% | 5th |
| Islwyn | ACKERMAN, Lyn | 55,697 | 63.6% | 3,794 | 10.7% | -2.3% | 4th |
| Carmarthen West and South Pembrokeshire | WILLIAMS, Elwyn | 57,755 | 69.9% | 4,201 | 10.4% | -0.0% | 4th |
| Swansea East | JONES, Dic | 58,011 | 58.0% | 3,498 | 10.4% | 3.7% | 4th |
| Clwyd South | AP GWYNFOR, Mabon | 54,996 | 63.8% | 3,620 | 10.3% | 1.6% | 4th |
| Ogmore | THOMAS, Tim | 55,572 | 63.4% | 3,556 | 10.1% | 0.5% | 4th |
| Merthyr Tydfil and Rhymney | MANN, Rhayna | 61,716 | 53.0% | 3,099 | 9.5% | 4.4% | 4th |
| Blaenau Gwent | LEWIS, Steffan | 51,335 | 61.7% | 2,849 | 9.0% | 4.9% | 4th |
| Wrexham | HARPER, Carrie | 50,992 | 64.2% | 2,501 | 7.6% | 1.5% | 4th |
| Cardiff South and Penarth | FODAY, Ben | 76,006 | 61.4% | 3,443 | 7.4% | 3.2% | 4th |
| Gower | THOMAS, Darren | 61,820 | 69.2% | 3,051 | 7.1% | 0.5% | 4th |
| Bridgend | RADCLIFFE, James | 59,998 | 65.8% | 2,784 | 7.1% | 1.1% | 4th |
| Vale of Clwyd | ROWLANDS, Mair | 56,505 | 62.4% | 2,486 | 7.1% | 1.2% | 4th |
| Swansea West | ROBERTS, Harri | 58,776 | 59.8% | 2,266 | 6.4% | 2.4% | 5th |
| Preseli Pembrokeshire | OSMOND, John | 57,291 | 70.8% | 2,518 | 6.2% | -3.0% | 5th |
| Torfaen | HACKLEY-GREEN, Boydd | 61,896 | 61.3% | 2,169 | 5.7% | 0.4% | 4th |
| Vale of Glamorgan | JOHNSON, Ian | 72,794 | 70.5% | 2,869 | 5.6% | 0.1% | 4th |
| Montgomeryshire | GRIFFITH, Ann | 48,690 | 69.3% | 1,745 | 5.2% | -3.1% | 5th |
| Cardiff Central | POLLARD, Martin | 57,456 | 67.3% | 1,925 | 5.0% | 1.5% | 6th |
| Delyn | ROWLINSON, Paul | 53,639 | 69.8% | 1,803 | 4.8% | -0.2% | 4th |
| Cardiff North | WALKER JONES, Elin | 67,196 | 76.1% | 2,301 | 4.5% | 1.2% | 4th |
| Brecon and Radnorshire | GREAVES, Freddy | 54,441 | 73.6% | 1,767 | 4.4% | 1.9% | 5th |
| Newport West | COOPEY, Simon | 62,137 | 64.9% | 1,604 | 4.0% | 1.2% | 4th |
| Monmouth | CLARK, Jonathan | 62,248 | 76.2% | 1,875 | 4.0% | 1.2% | 5th |
| Alyn and Deeside | HURST, Jacqueline | 62,016 | 66.6% | 1,608 | 3.9% | 0.0% | 5th |
| Newport East | SALKELD, Tony | 56,015 | 62.7% | 1,231 | 3.5% | 1.4% | 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.