An election to the 56th Parliament of the United Kingdom for the constituency area of Dwyfor Meirionnydd, held as part of the general election on 7 May 2015.
Plaid Cymru hold by Liz Saville-Roberts with a majority of 5,261 - 18.2% - on a turnout of 65.1%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| SAVILLE-ROBERTS, Liz | PC | 11,811 | 40.9% | -3.5% |
| FAIRLAMB, Neil | Con | 6,550 | 22.7% | 0.4% |
| GRIFFITHS CLARKE, Mary | Lab | 3,904 | 13.5% | -0.4% |
| GILLIBRAND, Christopher | UKIP | 3,126 | 10.8% | 8.1% |
| HUGHES, Louise | Ind | 1,388 | 4.8% | - |
| CHURCHMAN, Stephen | LD | 1,153 | 4.0% | -8.3% |
| FOTHERGILL, Marc | Green | 981 | 3.4% | - |
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 44,394, having a valid vote count of 28,913 and an invalid vote count of 65.
Result declared at 03:24 on 8 May 2015.