An election to the 57th Parliament of the United Kingdom for the constituency area of Hornchurch and Upminster, held as part of the general election on 8 June 2017.
Conservative hold by Julia Dockerill with a majority of 17,723 - 31.6% - on a turnout of 69.4%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| DOCKERILL, Julia | Con | 33,750 | 60.2% | 11.2% |
| GILL, Rocky | Lab | 16,027 | 28.6% | 8.5% |
| WEBB, Lawrence | UKIP | 3,502 | 6.2% | -19.1% |
| MITCHELL, Jonathan | LD | 1,371 | 2.4% | -0.3% |
| CATON, Peter | Green | 1,077 | 1.9% | -0.6% |
| FURNESS, David | BNP | 318 | 0.6% | 0.2% |
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 80,802, having a valid vote count of 56,045 and an invalid vote count of 110.
Result declared at 03:14 on 9 June 2017.