An election to the 57th Parliament of the United Kingdom for the constituency area of Winchester, held as part of the general election on 8 June 2017.
Conservative hold by Steve Brine with a majority of 9,999 - 17.5% - on a turnout of 78.8%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| BRINE, Steve | Con | 29,729 | 52.0% | -3.0% |
| PORTER, Jackie | LD | 19,730 | 34.5% | 10.1% |
| CHALONER, Mark | Lab | 6,007 | 10.5% | 2.2% |
| WAINWRIGHT, Andrew | Green | 846 | 1.5% | -3.3% |
| LYON, Martin | UKIP | 695 | 1.2% | -6.2% |
| SKELTON, Teresa | JACP | 149 | 0.3% | - |
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 72,497, having a valid vote count of 57,156 and an invalid vote count of 100.
Result declared at 05:15 on 9 June 2017.