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.