An election to the 57th Parliament of the United Kingdom for the constituency area of Montgomeryshire, held as part of the general election on 8 June 2017.
Conservative hold by Glyn Davies with a majority of 9,285 - 26.6% - on a turnout of 68.7%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| DAVIES, Glyn | Con | 18,075 | 51.8% | 6.8% |
| DODDS, Jane | LD | 8,790 | 25.2% | -4.1% |
| JONES, Iwan Wyn | Lab | 5,542 | 15.9% | 10.3% |
| HUGHES, Aled Morgan | PC | 1,960 | 5.6% | 0.4% |
| CHALONER, Richard | Green | 524 | 1.5% | -2.2% |
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 50,755, having a valid vote count of 34,891 and an invalid vote count of 75.
Result declared at 02:25 on 9 June 2017.