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 RetainedAssiniboiaNovember 8, 1971Albert B. Douglas LiberalBill Knight New DemocraticDeathNoCentral NovaMay 31, 1971Russell MacEwan Progressive ConservativeElmer M. MacKay Progressive ConservativeResignationYesBrantMay 31, 1971James Elisha Brown LiberalDerek Blackburn New DemocraticAppointed a judgeNoChamblyMay 31, 1971Bernard Pilon LiberalYvon L'Heureux LiberalDeathYesTrois-RivièresMay 31, 1971Joseph-Alfred Mongrain LiberalClaude Lajoie LiberalDeathYesLisgarNovember 6, 1970George Muir Progressive ConservativeJack Murta Progressive ConservativeDeathYesFrontenacNovember 6, 1970Bernard Dumont Ralliement CréditisteLéopold Corriveau LiberalResignationNoLabelleNovember 6, 1970Léo Cadieux LiberalMaurice Dupras LiberalAppointed Ambassador to France YesSelkirkApril 13, 1970Edward Schreyer New DemocraticDoug Rowland New DemocraticResignationYesComox—AlberniApril 8, 1969Richard J. J. Durante LiberalThomas Speakman Barnett New DemocraticElection declared voidNoNanaimo—Cowichan—The IslandsFebruary 10, 1969Colin Cameron New DemocraticTommy C. Douglas New DemocraticDeathYes
See also List of federal by-elections in Canada
Sources Parliament of Canada–Elected in By-Elections