The 12th Canadian Parliament was in session from 15 November 1911 until 6 October 1917. The membership was set by the 1911 federal election on 21 September 1911, and it changed only somewhat due to resignations and by-elections until it was dissolved prior to the 1917 election. At 5 years, 10 months and 22 days, it was the longest parliament in Canadian history. The parliament was extended beyond the normal limit of five years by the British North America Act, 1916 as a result of World War I.

It was controlled by a Conservative/Liberal-Conservative majority under Prime Minister Sir Robert Borden and the 9th Canadian Ministry. The Official Opposition was the Liberal Party, led by Wilfrid Laurier. The last year of the wartime parliament was dominated by the Conscription Crisis of 1917. At the end of the parliament, a new ministry, the Union Government, was formed by Borden as a wartime coalition government including Liberals. Laurier refused to join and those Liberals who supported Borden took the name Liberal-Unionists. The Union Government went on to win the 1917 federal election.

The Speaker was first Thomas Simpson Sproule, and later Albert Sévigny. See also List of Canadian electoral districts 1907-1914 for a list of the ridings in this parliament.

There were seven sessions of the 12th Parliament: SessionStartEnd 1st 15 November 1911 1 April 1912 2nd 21 November 1912 6 June 1913 3rd 15 January 1914 12 June 1914 4th 18 August 1914 22 August 1914 5th 4 February 1915 15 April 1915 6th 12 January 1916 18 May 1916 7th 18 January 1917 20 September 1917

List of members

Following is a full list of members of the twelfth Parliament listed first by province, then by electoral district.

Key: Party leaders are italicized. Parliamentary secretaries is indicated by "". Cabinet ministers are in boldface. The Prime Minister is both. The Speaker is indicated by "()".

Electoral districts denoted by an asterisk (*) indicates that district was represented by two members.

Alberta

Electoral districtNamePartyFirst elected/previously electedNo. of termsCalgaryRichard Bedford BennettConservative19111st termEdmontonFrank OliverLiberal18965th termMacleodDavid WarnockLiberal19111st termMedicine HatWilliam Ashbury BuchananLiberal19111st termRed DeerMichael ClarkLiberal19082nd termStrathconaJames McCrie DouglasLiberal19092nd termVictoriaWilliam Henry WhiteLiberal19082nd term

British Columbia

Electoral districtNamePartyFirst elected/previously electedNo. of termsComox—AtlinHerbert Sylvester ClementsConservative1904, 19112nd term*KootenayArthur Samuel Goodeve (until 4 May 1912 railway appointment)Conservative19082nd termRobert Francis Green (by-election of 30 May 1912)Conservative19121st termNanaimoFrancis Henry ShepherdConservative19111st termNew WestminsterJames Davis TaylorConservative19082nd termVancouver CityHenry Herbert StevensConservative19111st termVictoria CityGeorge Henry BarnardConservative19082nd termYale—CaribooMartin Burrell (until 10 October 1911 ministerial appointment)Conservative19082nd termMartin Burrell (by-election of 4 November 1911)Conservative

Manitoba

Electoral districtNamePartyFirst elected/previously electedNo. of termsBrandonJames Albert Manning AikinsConservative19111st termDauphinRobert CruiseLiberal19111st termLisgarWilliam Henry SharpeConservative19082nd termMacdonaldWilliam D. Staples (until 10 April 1912 commissioner appointment)Conservative19043rd termAlexander Morrison (by-election of 12 October 1912, until election voided 10 November 1913)Conservative19121st termAlexander Morrison (by-election of 13 December 1913)ConservativeMarquetteWilliam James Roche (until 10 October 1911 Secretary of State appointment)Conservative18965th termWilliam James Roche (by-election of 27 October 1911)ConservativePortage la PrairieArthur Meighen (until 26 June 1913 Solicitor General appointment)Conservative19082nd termArthur Meighen (by-election of 19 July 1913)ConservativeProvencherJohn Patrick MolloyLiberal19082nd termSelkirkGeorge Henry BradburyConservative19082nd termSourisFrederick Laurence SchaffnerConservative19043rd termWinnipegAlexander Haggart (resigned 11 October 1911)Conservative19082nd termRobert Rogers (by-election of 27 October 1911)Conservative19111st term

New Brunswick

Electoral districtNamePartyFirst elected/previously electedNo. of termsCarletonFrank Broadstreet CarvellLiberal19043rd termCharlotteThomas Aaron HarttConservative19111st termCity and County of St. JohnJohn Waterhouse Daniel (resigned 17 October 1911)Conservative19044th termJohn Douglas Hazen (by-election of 27 October 1911)Conservative1891, 19112nd term*City of St. JohnWilliam PugsleyLiberal19043rd termGloucesterOnésiphore TurgeonLiberal19004th termKentFerdinand-Joseph RobidouxConservative19111st termKing's and AlbertGeorge William FowlerConservative1900, 19113rd term*NorthumberlandWilliam Stewart LoggieLiberal19043rd termRestigoucheJames ReidLiberal19004th termSunbury—Queen'sHugh Havelock McLeanLiberal19082nd termVictoriaPius MichaudLiberal19073rd termWestmorlandHenry Emmerson (died 9 July 1914)Liberal19004th termArthur Bliss Copp (by-election of 1 February 1915)Liberal19151st termYorkOswald Smith Crocket (until 11 December 1913 judicial appointment)Conservative19043rd termHarry Fulton McLeod (by-election of 31 December 1913)Conservative19131st term

Nova Scotia

Electoral districtNamePartyFirst elected/previously electedNo. of termsAnnapolisAvard Longley DavidsonConservative19111st termAntigonishWilliam ChisholmLiberal19053rd termCape Breton SouthWilliam F. CarrollLiberal19111st termColchesterJohn StanfieldConservative19073rd termCumberlandEdgar Nelson Rhodes Conservative19082nd termDigbyClarence JamesonConservative19082nd termGuysboroughJohn Howard SinclairLiberal19044th termHalifax*Robert Laird Borden (until 10 October 1911 Prime Minister appointment)Conservative1896, 19055th term* Robert Laird Borden (by-election of 27 October 1911)ConservativeAlexander Kenneth MacleanLiberal19043rd termHantsHadley Brown TremainConservative19111st termInvernessAlexander William ChisholmLiberal19082nd termKingsArthur de Witt FosterConservative19111st termLunenburgDugald StewartConservative19111st termNorth Cape Breton and VictoriaDaniel Duncan McKenzieLiberal1904, 19083rd term*PictouEdward Mortimer MacdonaldLiberal19043rd termRichmondGeorge William KyteLiberal19082nd termShelburne and Queen'sFleming Blanchard McCurdy Conservative19111st termYarmouthBowman Brown LawLiberal19024th termBowman Brown Law died in the 1916 Parliament fireVacant

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