Legislative Assembly of Alberta

The first session of the first Legislature of Alberta opened on March 15, 1906, in the Thistle Rink, Edmonton, north of Jasper Avenue. After the speech from the throne, the assembly held its sessions in the McKay Avenue School. In this school Alberta MLAs chose the provincial capital, Edmonton, and the future site for the Alberta Legislature Building: the bank of the North Saskatchewan River. Allan Merrick Jeffers, a graduate of the Rhode Island School of Design was the architect who was chosen to build the assembly building. From 1908 to 1911 the Legislative Assembly met in a hall annexed to the old Terrace Building.

In September 1912 Prince Arthur, Duke of Connaught and Strathearn, Governor General of Canada, declared the new Legislature building officially open.

Louise McKinney and Roberta MacAdams were the first women elected to the assembly, in the 1917 election, the first women in any legislature of the British Empire.

From 1926 to 1955, Edmonton and Calgary MLAs were elected through a form of proportional representation, while in that period, the other MLAs were elected using instant-runoff voting.

In 1965, the Alberta Election Act was amended to give the vote to Treaty Indians.

Early majorities in the Legislature were held by the Alberta Liberal Party, followed by the United Farmers of Alberta and Alberta Social Credit Party. The Progressive Conservatives held the legislature from 1971 until 2015, when the Alberta New Democratic Party held a majority for a single term. Since 2019, the United Conservative Party has held successive majorities.

Most members of the 31st Alberta Legislature were elected in the 31st Alberta general election held on May 29, 2023, but some were elected in subsequent by-elections. Peter Guthrie was elected as a UCP candidate but has since become a Progressive Tory. Bold indicates cabinet members, and party leaders are italicized.

The 31st Alberta Legislative Assembly was constituted after the general election on May 29, 2023. The United Conservative Party, led by incumbent Premier Danielle Smith, formed the government with a reduced majority. The New Democrats, led by former Premier Rachel Notley, won the second most seats and formed the official opposition. As of December 2025, under recall election legislation introduced by the UCP, 21 MLAs have recall petition campaigns in progress; this includes Premier Danielle Smith. 20 of the petitions are against UCP members.

• Party leaders are italicized. Bold indicates cabinet minister.

1905–1909

232LibCon

1909–1913

1913–1917

3917LibCon

1917–1921

1921–1926

1926–1930

1930–1935

1935–1940

5256LibConSoc Cred

1940–1944

1944–1948

1948–1952

1952–1955

1955–1959

1959–1963

1963–1967

2601LibSoc CredCoal

1967–1971

1971–1975

49251PCSoc CredNDP

1975–1979

1979–1982

7441PCSoc CredNDP

1982–1986

7522PCNDPInd

1986–1989

1989–1993

85916LibPCNDP

1993–1997

3251LibPC

1997–2001

18632LibPCNDP

2001–2004

7742LibPCNDP

2004–2008

2008–2012

9722LibPCNDP

2012–2015

2015–2019

2019–2023

6324UCNDP

2023–Present

4938UCNDP