1966 General Election - Louth
| Year | 1966 | 
| General election | 1966 General Election | 
| Constituency | Louth | 
| Turnout | 74.4% | 
Results
| Candidate | Party | Votes | 
| Osborne, Sir Cyril | Conservative | 19,977 | 
| Brumby, Robin | Labour | 15,885 | 
| Marshall, Edmund | Liberal | 7,222 | 
| Year | 1966 | 
| General election | 1966 General Election | 
| Constituency | Louth | 
| Turnout | 74.4% | 
| Candidate | Party | Votes | 
| Osborne, Sir Cyril | Conservative | 19,977 | 
| Brumby, Robin | Labour | 15,885 | 
| Marshall, Edmund | Liberal | 7,222 |