Melanie Onn Elections contested
Parliament Member page for Melanie Onn
Elections listed as contested and won are those forming part of any general election or by-election contested since since the 2010 general election. A person may have contested an election outside of this grouping.
| Election | Constituency | Election type | Party | Vote count | Vote share | Position |
| 4 July 2024 | Great Grimsby and Cleethorpes | General election | Lab | 15,336 | 41.9% | 1st |
| 12 December 2019 | Great Grimsby | General election | Lab | 10,819 | 32.7% | 2nd |
| 8 June 2017 | Great Grimsby | General election | Lab | 17,545 | 49.4% | 1st |
| 7 May 2015 | Great Grimsby | General election | Lab | 13,414 | 39.8% | 1st |