An election to the 57th Parliament of the United Kingdom for the constituency area of Dwyfor Meirionnydd, held as part of the general election on 8 June 2017.
Plaid Cymru hold by Liz Saville Roberts with a majority of 4,850 - 16.0% - on a turnout of 67.9%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| SAVILLE ROBERTS, Liz | PC | 13,687 | 45.1% | 4.3% |
| FAIRLAMB, Neil | Con | 8,837 | 29.1% | 6.5% |
| NORMAN, Mathew | Lab | 6,273 | 20.7% | 7.2% |
| CHURCHMAN, Stephen | LD | 937 | 3.1% | -0.9% |
| WYKES, Frank | UKIP | 614 | 2.0% | -8.8% |
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.
An electorate of 44,699, having a valid vote count of 30,348 and an invalid vote count of 67.
Result declared at 02:45 on 9 June 2017.