By-elections to the 18th Canadian Parliament were held to fill vacancies in the House of Commons of Canada between the 1935 federal election and the 1940 federal election. The Liberal Party of Canada led a majority government for the 18th Canadian Parliament.
31 vacant seats were filled through by-elections. By-election Date Incumbent Party Winner Party Cause RetainedPrinceJanuary 2, 1940Alfred Edgar MacLean LiberalJames Layton Ralston LiberalDeath YesSaskatoon CityDecember 18, 1939 Alexander MacGillivray Young LiberalWalter George Brown United Reform MovementDeath NoSt. JamesDecember 18, 1939 Fernand Rinfret LiberalEugène Durocher LiberalDeath YesJacques CartierDecember 18, 1939 Vital Mallette LiberalElphège Marier LiberalDeath YesKentDecember 11, 1939 James Rutherford LiberalArthur Lisle Thompson LiberalDeath YesCalgary WestSeptember 18, 1939 R. B. Bennett ConservativeDouglas Cunnington ConservativeResignation YesBrandonNovember 14, 1938 David Wilson Beaubier ConservativeJames Ewen Matthews LiberalDeath NoLondonNovember 14, 1938 Frederick Cronyn Betts ConservativeRobert James Manion ConservativeDeathYesWaterloo SouthNovember 14, 1938 Alexander Edwards ConservativeKarl Homuth ConservativeDeathYesCartierNovember 7, 1938 Samuel William Jacobs LiberalPeter Bercovitch LiberalDeath YesEdmonton EastMarch 21, 1938 William Samuel Hall Social CreditOrvis A. Kennedy Social CreditDeath YesArgenteuilFebruary 28, 1938 George H. Perley ConservativeGeorges Héon Independent ConservativeDeath NoSt. John—AlbertFebruary 21, 1938 William Ryan LiberalAllan McAvity LiberalDeath YesSt. HenryJanuary 17, 1938 Paul Mercier LiberalJoseph Arsène Bonnier LiberalAppointed a Circuit Court Judge of Montreal YesLotbinièreDecember 27, 1937Joseph-Achille Verville LiberalJoseph-Napoléon Francoeur LiberalDeathYesVictoriaNovember 29, 1937Simon Fraser Tolmie ConservativeRobert Mayhew LiberalDeathNoDufferin—SimcoeNovember 8, 1937William Earl Rowe ConservativeWilliam Earl Rowe ConservativeResignation YesFrontenac—AddingtonNovember 1, 1937Colin Campbell LiberalAngus Neil McCallum LiberalResignationYesCape Breton North and VictoriaOctober 18, 1937Daniel Alexander Cameron LiberalMatthew Maclean LiberalDeathYesRenfrew NorthApril 5, 1937Matthew McKay LiberalRalph Warren LiberalDeathYesHamilton WestMarch 22, 1937Herbert Earl Wilton ConservativeJohn Allmond Marsh ConservativeDeathYesBonaventureMarch 22, 1937Charles Marcil LiberalPierre-Emile Cote LiberalDeathYesOttawa EastOctober 26, 1936Edgar-Rodolphe-Eugène Chevrier LiberalJoseph Albert Pinard LiberalAppointed a judge of the High Court of Justice of Ontario YesGloucesterAugust 17, 1936Peter Veniot LiberalClarence Joseph Veniot LiberalDeathYesWrightAugust 3, 1936Fizalam-William Perras LiberalRodolphe Leduc LiberalDeathYesVictoriaJune 8, 1936D'Arcy Plunkett ConservativeSimon Tolmie ConservativeDeathYesAntigonish—GuysboroughMarch 16, 1936William Duff LiberalJ. Ralph Kirk LiberalCalled to the SenateYesPortneufJanuary 27, 1936Lucien Cannon LiberalPierre Gauthier LiberalAppointed a Superior Court Judge of QuebecYesAssiniboiaJanuary 6, 1936Robert McKenzie LiberalJames Garfield Gardiner LiberalResignation to provide a seat for Gardiner YesQueen'sDecember 30, 1935J. James Larabee LiberalCharles Avery Dunning LiberalAppointed a Fisheries Protection Officer Yes
See also List of federal by-elections in Canada
Sources Parliament of Canada–Elected in By-Elections