An election to the 57th Parliament of the United Kingdom for the constituency area of West Dorset, held as part of the general election on 8 June 2017.
Conservative hold by Oliver Letwin with a majority of 19,091 - 32.0% - on a turnout of 75.4%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| LETWIN, Oliver | Con | 33,081 | 55.5% | 5.3% |
| CANNING, Andy | LD | 13,990 | 23.5% | 1.9% |
| RHODES, Lee | Lab | 10,896 | 18.3% | 8.3% |
| CLAYTON, Kelvin | Green | 1,631 | 2.7% | -3.0% |
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 79,048, having a valid vote count of 59,598 and an invalid vote count of 152.
Result declared at 02:57 on 9 June 2017.