An election to the 57th Parliament of the United Kingdom for the constituency area of Gower, held as part of the general election on 8 June 2017.
Labour gain from Conservatives by Tonia Antoniazzi with a majority of 3,269 - 7.2% - on a turnout of 73.3%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| ANTONIAZZI, Tonia | Lab | 22,727 | 49.9% | 12.8% |
| DAVIES, Byron | Con | 19,458 | 42.7% | 5.6% |
| ROBERTS, Harri | PC | 1,669 | 3.7% | -3.5% |
| EVANS, Howard | LD | 931 | 2.0% | -1.6% |
| FORD, Ross | UKIP | 642 | 1.4% | -9.8% |
| WINSTANLEY, Jason | Prte | 149 | 0.3% | - |
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 62,163, having a valid vote count of 45,576 and an invalid vote count of 53.
Result declared at 02:46 on 9 June 2017.