| Year: | 1857 |
|---|---|
| General election: | 1857 General Election |
| Constituency: | South Northamptonshire |
| Turnout: | 60.2% |
Results
| Candidate | Party | Votes |
| Spencer, John Poyntz | Whig | 2107 |
| Knightley, Rainald | Conservative | 1932 |
| Howard-Vyse, Richard Henry Richard | Conservative | 1593 |