Commons polling
By-elections to the 28th Canadian Parliament were held to fill vacancies in the House of Commons of Canada between the 1968 federal election and the 1972 federal election. The Liberal Party of Canada led a majority government for the entirety of the 29th Canadian Parliament, though their number did decrease from by-elections.
Fifteen seats became vacant during the life of the Parliament. Eleven of these vacancies were filled through by-elections, and four seats remained vacant when the 1972 federal election was called.
By-election | Date | Incumbent | Party | Winner | Party | Cause | Retained |
Assiniboia | November 8, 1971 | Albert B. Douglas | | Liberal | Bill Knight | | New Democratic | Death | No |
Central Nova | May 31, 1971 | Russell MacEwan | | Progressive Conservative | Elmer M. MacKay | | Progressive Conservative | Resignation | Yes |
Brant | May 31, 1971 | James Elisha Brown | | Liberal | Derek Blackburn | | New Democratic | Appointed a judge | No |
Chambly | May 31, 1971 | Bernard Pilon | | Liberal | Yvon L'Heureux | | Liberal | Death | Yes |
Trois-Rivières | May 31, 1971 | Joseph-Alfred Mongrain | | Liberal | Claude Lajoie | | Liberal | Death | Yes |
Lisgar | November 6, 1970 | George Muir | | Progressive Conservative | Jack Murta | | Progressive Conservative | Death | Yes |
Frontenac | November 6, 1970 | Bernard Dumont | | Ralliement Créditiste | Léopold Corriveau | | Liberal | Resignation | No |
Labelle | November 6, 1970 | Léo Cadieux | | Liberal | Maurice Dupras | | Liberal | Appointed Ambassador to France | Yes |
Selkirk | April 13, 1970 | Edward Schreyer | | New Democratic | Doug Rowland | | New Democratic | Resignation | Yes |
Comox—Alberni | April 8, 1969 | Richard J. J. Durante | | Liberal | Thomas Speakman Barnett | | New Democratic | Election declared void | No |
Nanaimo—Cowichan—The Islands | February 10, 1969 | Colin Cameron | | New Democratic | Tommy C. Douglas | | New Democratic | Death | Yes |