1865 General Election - South Northamptonshire
| Year | 1865 |
| General election | 1865 General Election |
| Constituency | South Northamptonshire |
| Turnout | 60.0% |
Results
| Candidate | Party | Votes |
| Knightley, Rainald | Conservative | 2,206 |
| Cartwright, Henry | Conservative | 2,092 |
| FitzRoy, Frederick John | Liberal | 2,054 |