An election to the 56th Parliament of the United Kingdom for the constituency area of Torfaen, held as part of the general election on 7 May 2015.
Labour hold by Nick Thomas-Symonds with a majority of 8,169 - 21.5% - on a turnout of 61.3%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| THOMAS-SYMONDS, Nick | Lab | 16,938 | 44.6% | -0.1% |
| SMITH, Graham | Con | 8,769 | 23.1% | 3.1% |
| BESWICK, Ken | UKIP | 7,203 | 19.0% | 16.7% |
| HACKLEY-GREEN, Boydd | PC | 2,169 | 5.7% | 0.4% |
| WILLOTT, Alison | LD | 1,271 | 3.4% | -13.3% |
| COOKE, Matt | Green | 746 | 2.0% | 0.8% |
| COX, John | SL | 697 | 1.8% | - |
| GRIFFITHS, Mark | Comm | 144 | 0.4% | - |
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 61,896, having a valid vote count of 37,937 and an invalid vote count of 68.
Result declared at 02:45 on 8 May 2015.