By-elections
| By-election | Date | Incumbent | Party | Winner | Party | Cause | Retained | ||
|---|---|---|---|---|---|---|---|---|---|
| Vaughan | November 29, 2010 | Maurizio Bevilacqua | Liberal | Julian Fantino | Conservative | Resignation | No | ||
| Dauphin—Swan River—Marquette | November 29, 2010 | Inky Mark | Conservative | Robert Sopuck | Conservative | Resignation | Yes | ||
| Winnipeg North | November 29, 2010 | Judy Wasylycia-Leis | NDP | Kevin Lamoureux | Liberal | Resignation | No | ||
| Cumberland—Colchester—Musquodoboit Valley | November 9, 2009 | Bill Casey | Independent | Scott Armstrong | Conservative | Resignation | No | ||
| Hochelaga | November 9, 2009 | Réal Ménard | Bloc Québécois | Daniel Paillé | Bloc Québécois | Resignation | Yes | ||
| Montmagny—L'Islet—Kamouraska—Rivière-du-Loup | November 9, 2009 | Paul Crête | Bloc Québécois | Bernard Généreux | Conservative | Resignation | No | ||
| New Westminster—Coquitlam | November 9, 2009 | Dawn Black | NDP | Fin Donnelly | NDP | Resignation | Yes | ||
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