The 26th Alberta Legislative Assembly was in session from March 1, 2005, to February 4, 2008, with the membership of the assembly determined by the results of the 2004 Alberta general election held on November 22, 2004.

[1] Alberta's twenty-sixth government was controlled by the majority Progressive Conservative Association of Alberta, led by Premier Ralph Klein until his resignation on December 24, 2006, after which he was succeeded by Ed Stelmach.

The Official Opposition was led by Kevin Taft of the Liberal Party.

In the list below, cabinet members' names are bolded; leaders of official parties are italicized.

This legislature had the distinction of being addressed by Elizabeth II, Queen of Canada, to help celebrate Alberta's centennial.