An election to the 57th Parliament of the United Kingdom for the constituency area of Great Grimsby, held as part of the general election on 8 June 2017.
Labour hold by Melanie Onn with a majority of 2,565 - 7.2% - on a turnout of 57.5%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| ONN, Melanie | Lab | 17,545 | 49.4% | 9.6% |
| GIDEON, Jo | Con | 14,980 | 42.2% | 15.9% |
| HOOKEM, Mike | UKIP | 1,648 | 4.6% | -20.3% |
| BEASANT, Steve | LD | 954 | 2.7% | -2.3% |
| MCGILLIGAN-FELL, Christina | Ind | 394 | 1.1% | - |
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 61,743, having a valid vote count of 35,521 and an invalid vote count of 60.
Result declared at 02:21 on 9 June 2017.