An election to the 57th Parliament of the United Kingdom for the constituency area of Don Valley, held as part of the general election on 8 June 2017.
Labour hold by Caroline Flint with a majority of 5,169 - 11.2% - on a turnout of 62.2%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| FLINT, Caroline | Lab | 24,351 | 53.0% | 6.8% |
| BELL, Aaron | Con | 19,182 | 41.7% | 16.4% |
| MANION, Stevie | Yrks | 1,599 | 3.5% | - |
| SMITH, Anthony | LD | 856 | 1.9% | -1.6% |
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 73,990, having a valid vote count of 45,988 and an invalid vote count of 95.
Result declared at 02:51 on 9 June 2017.