1964 General Election - South Down
| Year | 1964 |
| General election | 1964 General Election |
| Constituency | South Down |
| Turnout | 72.1% |
Results
| Candidate | Party | Votes |
| Orr, Lawrence Percy Story | UUP | 32,922 |
| Mussen, George | Independent Republican | 11,031 |
| Thompson, Samuel | NI Labour | 6,260 |
| Gooding, Hamilton | Ulster Liberal | 5,610 |