An election to the 56th Parliament of the United Kingdom for the constituency area of Halifax, held as part of the general election on 7 May 2015.
Labour hold by Holly Lynch with a majority of 428 - 1.0% - on a turnout of 62.1%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| LYNCH, Holly | Lab | 17,506 | 40.0% | 2.6% |
| ALLOTT, Philip | Con | 17,078 | 39.0% | 5.0% |
| PHILLIPS, Liz | UKIP | 5,621 | 12.8% | 11.3% |
| ILYAS, Mohammad | LD | 1,629 | 3.7% | -15.4% |
| SCOTT, Gary | Green | 1,142 | 2.6% | - |
| JAVED, Asama | Res | 465 | 1.1% | - |
| BENDRIEN, Trevor | CHP | 312 | 0.7% | - |
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 70,462, having a valid vote count of 43,753 and an invalid vote count of 241.
Result declared at 08:48 on 8 May 2015.