By-elections to the 12th Canadian Parliament were held to elect members of the House of Commons of Canada between the 1911 federal election and the 1917 federal election. The Conservative Party of Canada led a majority government for the 12th Canadian Parliament.
The list includes Ministerial by-elections which occurred due to the requirement that Members of Parliament recontest their seats upon being appointed to Cabinet. These by-elections were almost always uncontested. This requirement was abolished in 1931. By-election Date Incumbent Party Winner Party Cause RetainedDorchesterJanuary 27, 1917Albert Sévigny ConservativeAlbert Sévigny ConservativeRecontested upon appointment as Minister of Inland RevenueYesToronto EastDecember 14, 1916Albert Edward Kemp ConservativeAlbert Edward Kemp ConservativeRecontested upon appointment as Minister of Militia and DefenceYesHochelagaOctober 15, 1915Louis Coderre ConservativeEsioff-Léon Patenaude ConservativeAppointed a judge of the Superior Court of QuebecYesTerrebonneFebruary 8, 1915Wilfrid Bruno Nantel ConservativeGédéon Rochon ConservativeAppointed a Railway CommissionerYesWestmorlandFebruary 1, 1915Henry Emmerson LiberalArthur Bliss Copp LiberalDeathYesJacques CartierFebruary 1, 1915Frederick D. Monk ConservativeJoseph Adélard DesCarries ConservativeResignation (ill health)YesPrince AlbertFebruary 1, 1915James McKay ConservativeSamuel James Donaldson ConservativeAppointed a judge of the Supreme Court of SaskatchewanYesLondonFebruary 1, 1915Thomas Beattie ConservativeWilliam Gray ConservativeDeathYesWaterloo SouthFebruary 1, 1915George Adam Clare ConservativeFrank Stewart Scott ConservativeDeathYesChamplainNovember 7, 1914Pierre Édouard Blondin ConservativePierre Édouard Blondin ConservativeRecontested upon appointment as Minister of Inland RevenueYesQuebec CountyNovember 7, 1914Louis-Philippe Pelletier ConservativeThomas Chase-Casgrain ConservativeResignation prior to being appointed a judgeYesYorkDecember 31, 1913Oswald Smith Crocket ConservativeHarry Fulton McLeod ConservativeAppointed a judge of the Supreme Court of New BrunswickYesLanark SouthDecember 13, 1913John Graham Haggart ConservativeAdelbert Edward Hanna ConservativeDeathYesMacdonaldDecember 13, 1913Alexander Morrison ConservativeAlexander Morrison ConservativeElection declared voidYesBruce SouthOctober 30, 1913James J. Donnelly ConservativeReuben Eldridge Truax LiberalCalled to the SenateNoMiddlesex EastOctober 21, 1913Peter Elson ConservativeSamuel Francis Glass ConservativeDeathYesChâteauguayOctober 11, 1913James Pollock Brown LiberalJames Morris ConservativeDeathNoPortage la PrairieJuly 19, 1913Arthur Meighen ConservativeArthur Meighen ConservativeRecontested upon appointment as Solicitor GeneralYesHochelagaNovember 19, 1912Louis Coderre ConservativeLouis Coderre ConservativeRecontested upon appointment as Secretary of State for CanadaYesCarletonOctober 30, 1912Edward Kidd ConservativeWilliam Foster Garland ConservativeDeathYesRichelieuOctober 24, 1912Arthur Cardin LiberalArthur Cardin LiberalElection declared voidYesMacdonaldOctober 12, 1912William D. Staples ConservativeAlexander Morrison ConservativeAppointed Grain Commissioner for CanadaYesSimcoe SouthJune 10, 1912Haughton Lennox ConservativeWilliam Alves Boys ConservativeAppointed a judgeYesKootenayMay 30, 1912Arthur Samuel Goodeve ConservativeRobert Francis Green ConservativeAppointed a Railway CommissionerYesRenfrew SouthFebruary 22, 1912Thomas Andrew Low LiberalGeorge Perry Graham LiberalResignationYesNipissingNovember 8, 1911George Gordon ConservativeFrancis Cochrane ConservativeCalled to the SenateYesLeedsNovember 6, 1911George Taylor ConservativeWilliam Thomas White ConservativeCalled to the SenateYesYale—CaribooNovember 4, 1911Martin Burrell ConservativeMartin Burrell ConservativeRecontested upon appointment as Minister of AgricultureYesHalifaxOctober 27, 1911Robert Borden ConservativeRobert Borden ConservativeRecontested upon appointment as Prime MinisterYesElgin WestOctober 27, 1911Thomas Wilson Crothers ConservativeThomas Wilson Crothers ConservativeRecontested upon appointment as Minister of LabourYesSt. AnneOctober 27, 1911Charles Doherty ConservativeCharles Doherty ConservativeRecontested upon appointment as Minister of JusticeYesToronto NorthOctober 27, 1911George Eulas Foster ConservativeGeorge Eulas Foster ConservativeRecontested upon appointment as Minister of Trade and CommerceYesCity and County of St. JohnOctober 27, 1911John Waterhouse Daniel ConservativeJohn Douglas Hazen ConservativeResignation to provide a seat for HazenYesVictoriaOctober 27, 1911Sam Hughes Liberal-ConservativeSam Hughes Liberal-ConservativeRecontested upon appointment as Minister of Militia and DefenceYesJacques CartierOctober 27, 1911Frederick Debartzch Monk ConservativeFrederick Debartzch Monk ConservativeRecontested upon appointment as Minister of Public WorksYesTerrebonneOctober 27, 1911Wilfrid Bruno Nantel ConservativeWilfrid Bruno Nantel ConservativeRecontested upon appointment as Minister of Inland RevenueYesQuebec CountyOctober 27, 1911Louis-Philippe Pelletier ConservativeLouis-Philippe Pelletier ConservativeRecontested upon appointment as Postmaster-GeneralYesGrenvilleOctober 27, 1911John Dowsley Reid ConservativeJohn Dowsley Reid ConservativeRecontested upon appointment as Minister of CustomsYesMarquetteOctober 27, 1911William James Roche ConservativeWilliam James Roche ConservativeRecontested upon appointment as Secretary of State for CanadaYesWinnipegOctober 27, 1911Alexander Haggart ConservativeRobert Rogers ConservativeResignation to provide a seat for RogersYes
See also List of federal by-elections in Canada
Sources Parliament of Canada–Elected in By-Elections