October 1974 General Election - Truro
| Year | 1974 |
| General election | October 1974 General Election |
| Constituency | Truro |
| Turnout | 78.7% |
Results
| Candidate | Party | Votes |
| Penhaligon, David | Liberal | 22,549 |
| Dixon, Piers | Conservative | 22,085 |
| Long, AF | Labour | 11,606 |
| Whetter, James | Mebyon Kernow | 384 |