A by-election was held in Harborough on 8 May 1891 after the incumbent Conservative MP Thomas Tapling died on 11 April. The seat was won by the Liberal candidate Paddy Logan.
Results edit
| Party | Candidate | Votes | % | ±% | |
|---|---|---|---|---|---|
| Liberal | Paddy Logan | 5,982 | 52.1 | +7.6 | |
| Conservative | Gerald Holbech Hardy | 5,493 | 47.9 | -7.6 | |
| Majority | 489 | 4.2 | N/A | ||
| Turnout | 11,475 | 86.3 | +3.9 | ||
| Registered electors | 13,291 | ||||
| Liberal gain from Conservative | Swing | +7.6 | |||