| Year: | 1918 |
|---|---|
| General election: | 1918 General Election |
| Constituency: | South Londonderry |
| Turnout: | 77.1% |
Results
| Candidate | Party | Votes |
| Henry, Denis Stanislaus | Irish Unionist | 8942 |
| Conway, Arthur William | Irish Parliamentary | 3981 |
| Walsh, Louis Joseph | Sinn Féin | 3425 |