An election to the 57th Parliament of the United Kingdom for the constituency area of Sheffield, Hallam, held as part of the general election on 8 June 2017.
Labour gain from Liberal Democrats by Jared O'Mara with a majority of 2,125 - 3.7% - on a turnout of 77.6%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| O'MARA, Jared | Lab | 21,881 | 38.4% | 2.6% |
| CLEGG, Nick | LD | 19,756 | 34.6% | -5.4% |
| WALKER, Ian | Con | 13,561 | 23.8% | 10.2% |
| THURLEY, John | UKIP | 929 | 1.6% | -4.8% |
| ROBIN, Logan | Green | 823 | 1.4% | -1.8% |
| WINSTONE, Steven | SDP | 70 | 0.1% | - |
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 73,455, having a valid vote count of 57,020 and an invalid vote count of 89.
Result declared at 02:48 on 9 June 2017.