An election to the 57th Parliament of the United Kingdom for the constituency area of Midlothian, held as part of the general election on 8 June 2017.
Labour gain from SNP by Danielle Rowley with a majority of 885 - 2.0% - on a turnout of 66.3%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| ROWLEY, Danielle | Lab | 16,458 | 36.4% | 6.2% |
| THOMPSON, Owen | SNP | 15,573 | 34.4% | -16.2% |
| DONNELLY, Chris | Con | 11,521 | 25.4% | 13.5% |
| LAIRD, Ross | LD | 1,721 | 3.8% | 1.5% |
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 68,328, having a valid vote count of 45,273 and an invalid vote count of 71.
Result declared at 02:26 on 9 June 2017.