By-elections to the 23rd Canadian Parliament were held to fill vacancies in the House of Commons of Canada between the 1957 federal election and the 1958 federal election. The Progressive Conservative Party of Canada led a minority government for the 23rd Canadian Parliament.
Three vacant seats were filled through by-elections. By-election Date Incumbent Party Winner Party Cause RetainedYukonDecember 16, 1957James Aubrey Simmons LiberalErik Nielsen Progressive ConservativeElection declared voidNoHastings—FrontenacNovember 4, 1957George Stanley White Progressive ConservativeSidney Earle Smith Progressive ConservativeCalled to the SenateYesLanarkAugust 26, 1957William G. Blair Progressive ConservativeGeorge Doucett Progressive ConservativeDeathYes
See also List of federal by-elections in Canada
Sources Parliament of Canada–Elected in By-Elections