The 1875 Whitehaven by-election was fought on 16 December 1875. The by-election was fought due to the incumbent Conservative MP, George Cavendish-Bentinck, becoming Judge Advocate General. It was retained by the incumbent.
| Party | Candidate | Votes | % | ±% | |
|---|---|---|---|---|---|
| Conservative | George Cavendish-Bentinck | 1,503 | 82.8 | N/A | |
| Liberal | Charles Thompson [2] | 313 | 17.2 | New | |
| Majority | 1,190 | 65.6 | N/A | ||
| Turnout | 1,816 | 69.9 | N/A | ||
| Registered electors | 2,599 | ||||
| Conservative hold | Swing | N/A | |||