An election to the 57th Parliament of the United Kingdom for the constituency area of St Austell and Newquay, held as part of the general election on 8 June 2017.
Conservative hold by Steve Double with a majority of 11,142 - 20.6% - on a turnout of 69.0%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| DOUBLE, Steve | Con | 26,856 | 49.5% | 9.3% |
| NEIL, Kevin | Lab | 15,714 | 29.0% | 18.8% |
| GILBERT, Stephen | LD | 11,642 | 21.5% | -2.5% |
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 78,609, having a valid vote count of 54,212 and an invalid vote count of 231.
Result declared at 09:05 on 9 June 2017.