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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