| Jurisdiction: | AB |
| #: | 20th |
| Type: | Majority |
| Status: | inactive |
| Term-Begin: | March 10, 1983 |
| Term-End: | April 10, 1986 |
| Sc: | Gerard Amerongen |
| Scterm: | March 2, 1972 - June 11, 1986 |
| Pm: | Peter Lougheed |
| Pmterm: | September 10, 1971 - November 1, 1985 |
| Pm2: | Don Getty |
| Pmterm2: | November 1, 1985 - December 14, 1992 |
| Lo: | Grant Notley |
| Loterm: | November 2, 1982 - October 19, 1984 |
| Lo2: | Ray Martin |
| Loterm2: | November 6, 1984 - June 15, 1993 |
| Party: | Progressive Conservative Association of Alberta |
| Party2: | New Democratic Party |
| Sessionbegin: | March 10, 1983 |
| Sessionend: | March 2, 1984 |
| Sessionbegin2: | March 15, 1984 |
| Sessionend2: | March 13, 1985 |
| Sessionbegin3: | March 14, 1985 |
| Sessionend3: | April 2, 1986 |
| Sessionbegin4: | April 3, 1986 |
| Sessionend4: | April 10, 1986 |
| Ministry: | Lougheed cabinet |
| Ministry2: | Getty cabinet |
| Monarchterm: | February 6, 1952 - September 8, 2022 |
| Viceroy: | Hon. Frank C. Lynch-Staunton |
| Viceroyterm: | October 18, 1979 - January 22, 1985 |
| Viceroy2: | Hon. Helen Hunley |
| Viceroyterm2: | January 22, 1985 - March 11, 1991 |
| Members: | 79 |
| Lastparl: | 19th |
| Nextparl: | 21st |
The 20th Alberta Legislative Assembly was in session from March 10, 1983, to April 10, 1986, with the membership of the assembly determined by the results of the 1982 Alberta general election held on November 2, 1982. The Legislature officially resumed on March 10, 1983, and continued until the fourth session was prorogued and dissolved on April 10, 1986, prior to the 1986 Alberta general election on May 8, 1986.[1]
Alberta's twentieth government was controlled by the majority Progressive Conservative Association of Alberta for the fourth time, led by Premier Peter Lougheed until his resignation, he was replaced by Don Getty. The Official Opposition was led by Grant Notley of the New Democratic Party until his death on October 19, 1984, and later Ray Martin. The Speaker was Gerard Amerongen who would serve in the role until he was defeated in the 1986 Alberta general election.
| Affiliation | Members | 75 | 2 | 2 | |
|---|---|---|---|---|---|
| Total | 79 | ||||
For complete electoral history, see individual districts.