An election to the 57th Parliament of the United Kingdom for the constituency area of Leyton and Wanstead, held as part of the general election on 8 June 2017.
Labour hold by John Cryer with a majority of 22,607 - 49.0% - on a turnout of 70.9%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| CRYER, John | Lab | 32,234 | 69.8% | 11.2% |
| FARRIS, Laura | Con | 9,627 | 20.8% | -1.1% |
| SIMS, Ben | LD | 2,961 | 6.4% | 0.8% |
| GUNSTOCK, Ashley | Green | 1,351 | 2.9% | -4.4% |
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 65,149, having a valid vote count of 46,173 and an invalid vote count of 139.
Result declared at 03:12 on 9 June 2017.