An election to the 57th Parliament of the United Kingdom for the constituency area of South East Cambridgeshire, held as part of the general election on 8 June 2017.
Conservative hold by Lucy Frazer with a majority of 16,158 - 25.6% - on a turnout of 73.2%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| FRAZER, Lucy | Con | 33,601 | 53.3% | 4.9% |
| JONES, Huw | Lab | 17,443 | 27.7% | 12.5% |
| NETHSINGHA, Lucy | LD | 11,958 | 19.0% | -1.2% |
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 86,121, having a valid vote count of 63,002 and an invalid vote count of 226.
Result declared at 04:37 on 9 June 2017.