By-elections to the 34th Canadian Parliament were held to fill vacancies in the House of Commons of Canada between the 1988 federal election and the 1993 federal election. The Progressive Conservative Party of Canada led a majority government for the entirety of the 34th Canadian Parliament, though their number did decrease from by-elections.

Sixteen seats became vacant during the life of the Parliament. Six of these vacancies were filled through by-elections. By-election Date Incumbent Party Winner Party Cause RetainedBeauséjourDecember 10, 1990Fernand Robichaud    LiberalJean Chrétien    LiberalResignation to provide a seat for ChrétienYesYork NorthDecember 10, 1990Maurizio Bevilacqua    LiberalMaurizio Bevilacqua    LiberalElection declared voidYesOshawaAugust 13, 1990Ed Broadbent    New DemocraticMike Breaugh    New DemocraticResignationYesLaurier—Sainte-MarieAugust 13, 1990Jean-Claude Malépart    LiberalGilles Duceppe    IndependentDeathNoChamblyFebruary 12, 1990Richard Grisé    Progressive ConservativePhil Edmonston    New DemocraticResignationNoBeaver RiverMarch 13, 1989John Dahmer    Progressive ConservativeDeborah Grey    ReformDeath (cancer)No

See also List of federal by-elections in Canada

Sources Parliament of Canada–Elected in By-Elections