10th Canadian Parliament By-elections By-elections

| By_election | Date_ | Incumbent | Party_3 | Winner | Party_5 | Cause | Retained_ |
|---|---|---|---|---|---|---|---|
| Stanstead | January 22, 1908 | Henry Lovell | Liberal | Charles Henry Lovell | Liberal | Death | Yes |
| Huron South | January 22, 1908 | Benjamin B. Gunn | Conservative | Murdo Young McLean | Liberal | Death | No |
| Nicolet | December 30, 1907 | Charles Ramsay Devlin | Liberal | Gustave-Adolphe-Narcisse Turcotte | Liberal | Resignation upon appointment to the provincial cabinet of Quebec | Yes |
| City of Ottawa | December 23, 1907 | Napoléon Antoine Belcourt | Liberal | William H. Hutchison | Liberal | Called to the Senate | Yes |
| Labelle | December 23, 1907 | Henri Bourassa | Liberal | Charles Beautron Major | Liberal | Resignation to enter provincial politics | Yes |