An election to the 57th Parliament of the United Kingdom for the constituency area of Brighton, Kemptown, held as part of the general election on 8 June 2017.
Labour gain from Conservatives by Lloyd Russell-Moyle with a majority of 9,868 - 20.1% - on a turnout of 72.5%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| RUSSELL-MOYLE, Lloyd | Lab / Co-op | 28,703 | 58.3% | 19.2% |
| KIRBY, Simon | Con | 18,835 | 38.3% | -2.4% |
| TESTER, Emily | LD | 1,457 | 3.0% | -0.1% |
| HAZE, Doktor | Ind | 212 | 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 67,893, having a valid vote count of 49,207 and an invalid vote count of 154.
Result declared at 04:42 on 9 June 2017.