An election to the 57th Parliament of the United Kingdom for the constituency area of South East Cornwall, held as part of the general election on 8 June 2017.
Conservative hold by Sheryll Murray with a majority of 17,443 - 32.8% - on a turnout of 74.0%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| MURRAY, Sheryll | Con | 29,493 | 55.4% | 4.9% |
| DERRICK, Gareth | Lab | 12,050 | 22.6% | 13.3% |
| HUTTY, Phil | LD | 10,346 | 19.4% | 2.6% |
| CORNEY, Martin | Green | 1,335 | 2.5% | -2.9% |
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 71,880, having a valid vote count of 53,224 and an invalid vote count of 133.
Result declared at 09:22 on 9 June 2017.