An election to the 58th Parliament of the United Kingdom for the constituency area of Great Grimsby, held as part of the general election on 12 December 2019.
Conservative gain from Labour by Lia Nici with a majority of 7,331 - 22.2% - on a turnout of 53.9%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| NICI, Lia | Con | 18,150 | 54.9% | 12.7% |
| ONN, Melanie | Lab | 10,819 | 32.7% | -16.7% |
| BARKER, Christopher | BRX | 2,378 | 7.2% | - |
| BARFIELD, Ian | LD | 1,070 | 3.2% | 0.5% |
| EMMERSON, Loyd | Green | 514 | 1.6% | - |
| WINN, Nigel | Ind | 156 | 0.5% | - |
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 61,409, having a valid vote count of 33,087 and an invalid vote count of 71.
Result declared at 03:46 on 13 December 2019.