| Jurisdiction: | AB |
| #: | 12th |
| Type: | Majority |
| Status: | inactive |
| Term-Begin: | February 19, 1953 |
| Term-End: | May 12, 1955 |
| Sc: | Peter Dawson |
| Scterm: | February 25, 1937 - March 24, 1963 |
| Pm: | Ernest Charles Manning |
| Pmterm: | May 31, 1943 - December 12, 1968 |
| Lo: | James Harper Prowse |
| Loterm: | February 21, 1952 - April 15, 1958 |
| Party: | Social Credit Party |
| Party2: | Alberta Liberal Party |
| Party3: | Cooperative Commonwealth |
| Party4: | Progressive Conservative Association of Alberta |
| Sessionbegin: | February 19, 1953 |
| Sessionend: | April 2, 1953 |
| Sessionbegin2: | February 18, 1954 |
| Sessionend2: | April 8, 1954 |
| Sessionbegin3: | February 17, 1955 |
| Sessionend3: | May 12, 1955 |
| Ministry: | Manning cabinet |
| Monarchterm: | February 6, 1952 - September 8, 2022 |
| Viceroy: | Hon. John James Bowlen |
| Viceroyterm: | February 1, 1950 - December 16, 1959 |
| Members: | 60 |
| Lastparl: | 11th |
| Nextparl: | 13th |
The 12th Alberta Legislative Assembly was in session from February 19, 1953, to May 12, 1955, with the membership of the assembly determined by the results of the 1952 Alberta general election held on August 5, 1952. The Legislature officially resumed on February 19, 1953, and continued until the third session was prorogued and dissolved on May 12, 1955, prior to the 1955 Alberta general election.[1]
Alberta's twelfth government was controlled by the majority Social Credit Party for the fifth time, led by Premier Ernest Manning who would go on to be the longest serving Premier in Alberta history. The Official Opposition was led by James Harper Prowse a member of the Alberta Liberal Party. The Speaker was Peter Dawson who would serve until his death during the 15th legislature on March 24, 1963.
| Affiliation | Members | Social Credit | 53 | 3 | Co-operative Commonwealth | 1 | Progressive Conservative | 1 | Conservative | 1 | Independent Social Credit | 1 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Total | 60 | ||||||||||||