An election to the 57th Parliament of the United Kingdom for the constituency area of Belfast South, held as part of the general election on 8 June 2017.
DUP gain from SDLP by Emma Little Pengelly with a majority of 1,996 - 4.6% - on a turnout of 66.1%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| LITTLE PENGELLY, Emma | DUP | 13,299 | 30.4% | 8.2% |
| MCDONNELL, Alasdair | SDLP | 11,303 | 25.9% | 1.3% |
| BRADSHAW, Paula | APNI | 7,946 | 18.2% | 1.0% |
| O MUILLEOIR, Mairtin Samuel | SF | 7,143 | 16.3% | 2.5% |
| BAILEY, Clare | Green | 2,241 | 5.1% | -0.6% |
| HENDERSON, Michael | UUP | 1,527 | 3.5% | -5.6% |
| SALIER, Clare | Con | 246 | 0.6% | -0.9% |
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 66,105, having a valid vote count of 43,705 and an invalid vote count of 130.
Result declared at 03:20 on 9 June 2017.