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A by-election took place on 29 February 2024 in the UK Parliament constituency of Rochdale following the death of Labour MP Sir Tony Lloyd. The winner was George Galloway of the Workers Party of Britain, who received 40% of the vote and overturned a 9,668 vote Labour majority at the 2019 general election. The turnout was 39.7%, compared to a 60.1% turnout in the constituency at the previous general election.
| Party | Candidate | Votes | % | mw- ±% | |
| Workers Party | George Galloway | 12,335 | 39.7 | N/A | |
| Independent | David Tully | 6,638 | 21.3 | N/A | |
| Conservative | Paul Ellison | 3,731 | 12.0 | –19.2 | |
| Labour | Azhar Ali | 2,402 | 7.7 | –43.9 | |
| Liberal Democrats | Iain Donaldson | 2,164 | 7.0 | ±0.0 | |
| Reform | Simon Danczuk | 1,968 | 6.3 | –1.9 | |
| Independent | William Howarth | 523 | 1.7 | N/A | |
| Independent | Mark Coleman | 455 | 1.5 | N/A | |
| Green | Guy Otten | 436 | 1.4 | –0.7 | |
| Independent | Michael Howarth | 246 | 0.8 | N/A | |
| Monster Raving Loony | Ravin Rodent Subortna | 209 | 0.7 | N/A | |
| Majority | 5,697 | 18.4 | N/A | ||
| Turnout | 31,107 | 39.7 | –20.4 | ||
| Registered electors | |||||
| Workers Party gain from Labour | Swing | ||||
| Party | Candidate | Votes | % | ±% | |
| Labour | Tony Lloyd | 24,475 | 51.6 | –6.4 | |
| Conservative | Atifa Shah | 14,807 | 31.2 | +2.8 | |
| Brexit Party | Chris Green | 3,867 | 8.2 | N/A | |
| Liberal Democrats | Andy Kelly | 3,312 | 7.0 | –1.0 | |
| Green | Sarah Croke | 986 | 2.1 | N/A | |
| Majority | 9,668 | 20.4 | –9.2 | ||
| Turnout | 47,447 | 60.1 | –4.0 | ||
| Labour hold | Swing | –4.6 | |||