1900 General Election - South Mayo
| Year | 1900 |
| General election | 1900 General Election |
| Constituency | South Mayo |
| Turnout | 31.2% |
Results
| Candidate | Party | Votes |
| O'Donnell, John | Irish Parliamentary | 2,401 |
| MacBride, John | Independent Nationalist | 427 |
| Year | 1900 |
| General election | 1900 General Election |
| Constituency | South Mayo |
| Turnout | 31.2% |
| Candidate | Party | Votes |
| O'Donnell, John | Irish Parliamentary | 2,401 |
| MacBride, John | Independent Nationalist | 427 |