An election to the 57th Parliament of the United Kingdom for the constituency area of Blackpool South, held as part of the general election on 8 June 2017.
Labour hold by Gordon Marsden with a majority of 2,523 - 7.2% - on a turnout of 59.8%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| MARSDEN, Gordon | Lab | 17,581 | 50.3% | 8.5% |
| ANTHONY, Peter | Con | 15,058 | 43.1% | 9.3% |
| MATTHEWS, Noel | UKIP | 1,339 | 3.8% | -13.5% |
| GREENE, Bill | LD | 634 | 1.8% | -0.5% |
| WARNOCK, John | Green | 341 | 1.0% | -1.6% |
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 58,470, having a valid vote count of 34,953 and an invalid vote count of 44.
Result declared at 02:50 on 9 June 2017.