An election to the 57th Parliament of the United Kingdom for the constituency area of Streatham, held as part of the general election on 8 June 2017.
Labour hold by Chuka Umunna with a majority of 26,285 - 47.1% - on a turnout of 70.9%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| UMUNNA, Chuka | Lab | 38,212 | 68.5% | 15.5% |
| CADDY, Kim | Con | 11,927 | 21.4% | -3.7% |
| DAVIES, Alex | LD | 3,611 | 6.5% | -2.5% |
| GRIFFITHS, Nicole | Green | 1,696 | 3.0% | -5.8% |
| STEPHENSON, Robert | UKIP | 349 | 0.6% | -2.6% |
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 78,649, having a valid vote count of 55,795 and an invalid vote count of 161.
Result declared at 03:34 on 9 June 2017.