UK general election on 8 June 2017 Elections won by Plaid Cymru
A general election to the 57th Parliament of the United Kingdom with an electorate of 46,836,533, having 32,204,184 valid votes and 74,188 invalid votes.
Read the House of Commons Library briefing.
| Constituency | Candidate | Electorate | Turnout | Votes | Vote share | Vote change | Majority |
| Arfon | WILLIAMS, Hywel | 41,367 | 68.2% | 11,519 | 40.8% | -3.1% | 92 |
| Carmarthen East and Dinefwr | EDWARDS, Jonathan | 55,976 | 73.3% | 16,127 | 39.3% | 0.9% | 3,908 |
| Ceredigion | LAKE, Ben | 54,262 | 73.3% | 11,623 | 29.2% | 1.6% | 104 |
| Dwyfor Meirionnydd | SAVILLE ROBERTS, Liz | 44,699 | 67.9% | 13,687 | 45.1% | 4.3% | 4,850 |
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.