1966 General Election - Caerphilly
| Year | 1966 |
| General election | 1966 General Election |
| Constituency | Caerphilly |
| Turnout | 76.8% |
Results
| Candidate | Party | Votes |
| Edwards, Onesimus | Labour | 26,330 |
| Maddocks, Ronald | Conservative | 5,182 |
| Howell, John | Plaid Cymru | 3,949 |