An election to the 57th Parliament of the United Kingdom for the constituency area of Torfaen, held as part of the general election on 8 June 2017.
Labour hold by Nick Thomas-Symonds with a majority of 10,240 - 26.6% - on a turnout of 62.1%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| THOMAS-SYMONDS, Nick | Lab | 22,134 | 57.6% | 12.9% |
| SMITH, Graham | Con | 11,894 | 31.0% | 7.8% |
| REES, Jeff | PC | 2,059 | 5.4% | -0.4% |
| WILLIAMS, Ian | UKIP | 1,490 | 3.9% | -15.1% |
| BEST, Andrew | LD | 852 | 2.2% | -1.1% |
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 61,839, having a valid vote count of 38,429 and an invalid vote count of 62.
Result declared at 01:51 on 9 June 2017.