Rochdale by-election may refer to one of three by-elections held for the British House of Commons constituency of Rochdale in Lancashire:
- Rochdale by-election, 1940, an unopposed war-time election
- Rochdale by-election, 1958, the first televised election in the UK
- Rochdale by-election, 1972
- See also
- Rochdale
- List of United Kingdom by-elections