1945 General Election - Londonderry
| Year | 1945 |
| General election | 1945 General Election |
| Constituency | Londonderry |
| Turnout | 88.1% |
Results
| Candidate | Party | Votes |
| Ross, Ronald Deane | UUP | 40,214 |
| Cavanagh, Denis | Nationalist Party of Northern Ireland | 37,561 |
| Gordon, Milton | NI Labour | 1,471 |