An election to the 57th Parliament of the United Kingdom for the constituency area of Thornbury and Yate, held as part of the general election on 8 June 2017.
Conservative hold by Luke Hall with a majority of 12,071 - 23.8% - on a turnout of 74.7%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| HALL, Luke | Con | 28,008 | 55.3% | 14.2% |
| YOUNG, Claire | LD | 15,937 | 31.4% | -6.5% |
| MEAD, Brian | Lab | 6,112 | 12.1% | 4.3% |
| HAMILTON, Iain | Green | 633 | 1.2% | -1.5% |
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 67,892, having a valid vote count of 50,690 and an invalid vote count of 101.
Result declared at 03:57 on 9 June 2017.