Premiers of Alberta by time served in office as of June 24, 2017.
Years in power
25 years, 195 days 1943-05-31
—1968-12-12  7 mandates
The longest serving premier, Manning was leader of the Social Credit Party.
14 years, 52 days 1971-09-10—1985-11-01
Peter Lougheed was the first Progressive Conservative to become Premier of Alberta and also the only former Leader of the Opposition to become premier.
14 years, 0 days 1992-12-14—2006-12-14
John Edward Brownlee
8 years, 229 days 1925-11-23—1934-07-10
Brownlee resigned as the result of a
7 years, 262 days 1935-09-03—1943-05-23
 2 mandates
"Bible Bill" Aberhart was the first Social Credit premier, leading his party from no seats to a majority government in its first election.
Arthur Lewis Sifton
7 years, 157 days 1910-05-26—1917-10-30
Sifton resigned as premier to join Prime Minister Sir
Robert Borden's federal war cabinet.
7 years, 42 days 1985-11-01—1992-12-13
Getty lost his seat in the Alberta legislature in the 1989 provincial election but remained premier and re-entered the legislature through a by-election.
4 years, 297 days 2006-12-14—2011-10-07
Alexander Cameron Rutherford
4 years, 266 days 1905-09-02—1910-05-26
Rutherford was Alberta's first premier. He and his cabinet were forced to resign due to the
Alberta and Great Waterways Railway scandal.
4 years, 102 days 1921-08-13—1925-11-23
United Farmers of Alberta was led by the president during the 1921 general election. After UFA President Henry Wise Wood and UFA legal counsel John Edward Brownlee declined offers to lead the party, UFA vice-president Greenfield accepted. He did not have a seat in the legislature but was sworn in as Premier and successfully contested a by-election.
3 years, 287 days 1917-10-30—1921-08-13
Stewart was the province's last Liberal premier.
2 years, 272 days 1968-12-12—1971-09-10
Strom was the last Social Credit premier of Alberta.
2 years, 167 days 2011-10-07—2014-03-23
2 years, 31 days 2015-05-24
Notley is the first NDP Premier
Richard Gavin Reid
1 year, 55 days 1934-07-10—1935-09-03
Reid was Alberta's last United Farmer premier.
251 days 2014-09-15—2015-05-24
Prentice was Alberta's last Progressive Conservative premier.
176 days 2014-03-23—2014-09-15
Hancock was chosen as interim party leader during a leadership election.
^ a b There was no Premier of Alberta from May 23 until May 31, 1943, due to the death of Premier William Aberhart
^ The United Farmers of Alberta won the 1921 election without an MLA leader, but Greenfield was made leader immediately after it, and that election is counted here as having been won by Greenfield.