The 1950 Leicester North East by-election was held on 28 September 1950 when the incumbent Labour MP, Terence Donovan was appointed as a High Court Judge. It was retained by the Labour candidate Lynn Ungoed-Thomas.
| Party | Candidate | Votes | % | ±% | |
|---|---|---|---|---|---|
| Labour | Lynn Ungoed-Thomas | 18,777 | 57.92 | +1.43 | |
| Conservative | H A Taylor | 13,642 | 42.08 | +8.80 | |
| Majority | 5,135 | 15.84 | −7.37 | ||
| Turnout | 32,419 | ||||
| Labour hold | Swing | +3.68 | |||