The 1942 Manchester Clayton by-election was held on 17 October 1942. The by-election was held due to the death of the incumbent Labour MP, John Jagger. It was won by the Labour candidate Harry Thorneycroft. [1]
| Party | Candidate | Votes | % | ±% | |
|---|---|---|---|---|---|
| Labour | Harry Thorneycroft | 8,892 | 93.3 | +39.6 | |
| Independent | E. Hammond Foot | 636 | 6.7 | New | |
| Majority | 8,256 | 86.6 | +79.2 | ||
| Turnout | 9,528 | 20.8 | −56.2 | ||
| Labour hold | Swing | ||||