1955 General Election - South West Hertfordshire
| Year | 1955 |
| General election | 1955 General Election |
| Constituency | South West Hertfordshire |
| Turnout | 81.3% |
Results
| Candidate | Party | Votes |
| Longden, Sir Gilbert James Morley | Conservative | 28,847 |
| Thomas, Wyndham | Labour | 21,878 |