1918 General Election - Mid Armagh
| Year | 1918 |
| General election | 1918 General Election |
| Constituency | Mid Armagh |
| Turnout | 81.4% |
Results
| Candidate | Party | Votes |
| Lonsdale, James Rolston | Irish Unionist | 8,431 |
| O'Brien, Liam | Sinn Féin | 5,689 |
| Year | 1918 |
| General election | 1918 General Election |
| Constituency | Mid Armagh |
| Turnout | 81.4% |
| Candidate | Party | Votes |
| Lonsdale, James Rolston | Irish Unionist | 8,431 |
| O'Brien, Liam | Sinn Féin | 5,689 |