The 20th Canadian Parliament was in session from 6 September 1945, until 30 April 1949. The membership was set by the 1945 federal election on 11 June 1945, and it changed only somewhat due to resignations and by-elections until it was dissolved prior to the 1949 election.

It was controlled by a Liberal Party minority first under Prime Minister William Lyon Mackenzie King and the 16th Canadian Ministry, and later a majority under Prime Minister Louis St. Laurent and the 17th Canadian Ministry. The Official Opposition was the newly named Progressive Conservative Party, led first by John Bracken and later by George Drew.

The Speaker was Gaspard Fauteux. See also List of Canadian electoral districts 1933-1947 for a list of the ridings in this parliament.

In this parliament, the Co-operative Commonwealth Federation, led by M. J. Coldwell, overtook the Social Credit as third largest party.

There were five sessions of the 20th Parliament.

Party Standings Number of members per partyParty leaderGeneral ElectionJune 11, 1945LiberalWilliam Lyon Mackenzie King118Progressive ConservativeJohn Bracken66Co-operative Commonwealth M.J. Coldwell28Social CreditSolon Low13Other20Total Seats245

Office holders

Head of State positionImageNameFromToSovereignGeorge VIDecember 6, 1936February 6, 1952Governor GeneralAlexander Cambridge, 1st Earl of AthloneJune 21, 1940April 12, 1946Harold Alexander, 1st Earl Alexander of TunisApril 12, 1946January 28, 1952

Party leadership PartyNameFromToLiberalWilliam Lyon Mackenzie KingDecember 29, 1921June 28, 1926September 26, 1926August 7, 1930October 23, 1935November 15, 1948Louis St. LaurentAugust 7, 1948January 16, 1958Progressive ConservativeJohn BrackenDecember 11, 1942July 20, 1948Social CreditSolon Earl LowApril 6, 1944March 9, 1967CCFM.J. ColdwellJuly 29, 1942August 10, 1960

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

Key: Party leaders are italicized. Parliamentary assistants 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 termsAcadiaVictor QuelchSocial Credit19353rd termAthabaskaJoseph Miville DecheneLiberal19402nd termBattle RiverRobert FairSocial Credit19353rd termBow RiverCharles Edward JohnstonSocial Credit19353rd termCalgary EastDouglas HarknessProgressive Conservative19451st termCalgary WestArthur LeRoy SmithProgressive Conservative19451st termCamroseJames Alexander MarshallSocial Credit19353rd termEdmonton EastPatrick Harvey AshbySocial Credit19451st termEdmonton WestJames Angus MacKinnonLiberal19353rd termJasper—EdsonWalter Frederick KuhlSocial Credit19353rd termLethbridgeJohn Horne BlackmoreSocial Credit19353rd termMacleodErnest George HansellSocial Credit19353rd termMedicine HatWilliam Duncan WylieSocial Credit19451st termPeace RiverSolon Earl LowSocial Credit19451st termRed DeerFrederick Davis ShawSocial Credit19402nd termVegrevilleAnthony HlynkaSocial Credit19402nd termWetaskiwinNorman JaquesSocial Credit19353rd term

British Columbia

Electoral districtNamePartyFirst elected/previously electedNo. of termsCaribooWilliam IrvineCCF1921, 1926, 19454th term*Comox—AlberniJohn Lambert GibsonIndependent Liberal19451st termFraser ValleyGeorge CruickshankLiberal19402nd termKamloopsDavie FultonProgressive Conservative19451st termKootenay EastJames Herbert MatthewsCCF19451st termKootenay WestHerbert Wilfred HerridgeIndependent CCF19451st termCCFNanaimoGeorge PearkesProgressive Conservative19451st termNew WestminsterThomas Reid Liberal19304th termSkeenaHarry ArchibaldCCF19451st termVancouver—BurrardCharles MerrittProgressive Conservative19451st termVancouver CentreIan Alistair Mackenzie (until 19 January 1948 Senate appointment)Liberal19304th termRodney Young (by-election of 8 June 1948)CCF19481st termVancouver EastAngus MacInnisCCF19304th termVancouver NorthJames Sinclair Liberal19402nd termVancouver SouthHoward Charles GreenProgressive Conservative19353rd termVictoriaRobert Mayhew Liberal19373rd termYaleGrote Stirling (resigned 21 October 1947)Progressive Conservative19247th termOwen Jones (by-election of 31 May 1948)CCF19481st term

Manitoba

Electoral districtNamePartyFirst elected/previously electedNo. of termsBrandonJames Ewen MatthewsLiberal19383rd termChurchillRonald Stewart MooreCCF19451st termDauphinFred ZaplitnyCCF19451st termLisgarHoward WinklerLiberal19353rd termMacdonaldWilliam Gilbert WeirLiberal-Progressive19304th termMarquetteJames Allison Glen (resigned 4 November 1948)Liberal1926, 19354th term*Stuart Garson (by-election of 20 December 1948)Liberal19481st termNeepawaJohn BrackenProgressive Conservative19451st termPortage la PrairieHarry Leader (died 9 May 1946)Liberal1921, 19354th term*Calvert Charlton Miller (by-election of 21 October 1946)Progressive Conservative19461st termProvencherRené JutrasLiberal19402nd termSelkirkWilliam BryceCCF19432nd termSourisJ. Arthur RossProgressive Conservative19402nd termSpringfieldJohn SinnottLiberal19451st termSt. BonifaceFernand ViauLiberal19451st termWinnipeg NorthAlistair StewartCCF19402nd termWinnipeg North CentreStanley KnowlesCCF19422nd termWinnipeg SouthLeslie Mutch Liberal19353rd termWinnipeg South CentreRalph Maybank Liberal19353rd term

New Brunswick

Electoral districtNamePartyFirst elected/previously electedNo. of termsCharlotteA. Wesley StuartLiberal19451st termGloucesterClovis-Thomas RichardLiberal19451st termKentAurel LégerLiberal19402nd termNorthumberlandJohn William MaloneyLiberal19451st termRestigouche—MadawaskaBenoît MichaudLiberal19451st termRoyalAlfred Johnson BrooksProgressive Conservative19353rd termSt. John—AlbertKing HazenProgressive Conservative19402nd termVictoria—CarletonHeber Harold HatfieldProgressive Conservative19402nd termWestmorlandHenry Read EmmersonLiberal19353rd termYork—SunburyHedley Francis Gregory Bridges (died in office)Liberal19451st termMilton Fowler Gregg (by-election of 20 October 1947)Liberal19471st term

Nova Scotia

Electoral districtNamePartyFirst elected/previously electedNo. of termsAntigonish—GuysboroughJ. Ralph KirkLiberal19363rd termCape Breton North and VictoriaMatthew MacLeanLiberal19373rd termCape Breton SouthClarence GillisCCF19402nd termColchester—HantsFrank Thomas StanfieldProgressive Conservative19451st termCumberlandPercy Chapman BlackProgressive Conservative19402nd termDigby—Annapolis—KingsJames Lorimer Ilsley (resigned 27 October 1948)Liberal19265th termGeorge Nowlan (by-election of 13 December 1948)Progressive Conservative19481st termHalifax*Gordon Benjamin IsnorLiberal19353rd termWilliam Chisholm Macdonald (died 19 November 1946)Liberal19402nd termJohn Dickey (by-election of 14 July 1947, replaces Macdonald)Liberal19471st termInverness—RichmondMoses Elijah McGarryLiberal19402nd termPictouHenry Byron McCullochLiberal19353rd termQueens—LunenburgRobert Winters Liberal19451st termShelburne—Yarmouth—ClareLoran Ellis Baker Liberal19451st term

Ontario