List of premiers of Alberta by time in office

Premiers of Alberta by time served in office as of April 25, 2024.

Rank	Premier	Incumbency	Years in power	Number of Mandates	Remarks
1	Ernest Manning		1943-05-31—1968-12-12	7 mandates	The longest serving premier, Manning was leader of the Social Credit Party.
2	Peter Lougheed		1971-09-10—1985-11-01	4 mandates	Peter Lougheed was the first Progressive Conservative to become Premier of Alberta and also the only former Leader of the Opposition to become premier.
3	Ralph Klein		1992-12-14—2006-12-14	4 mandates
4	John Edward Brownlee		1925-11-23—1934-07-10	2 mandates	Brownlee resigned as the result of a sex scandal.
5	William Aberhart		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.
6	Arthur Lewis Sifton		1910-05-26—1917-10-30	2 mandates	Sifton resigned as premier to join Prime Minister Sir Robert Borden's federal war cabinet.
7	Don Getty		1985-11-01—1992-12-13	2 mandates	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.
8	Ed Stelmach		2006-12-14—2011-10-07	1 mandate
9	Alexander Cameron Rutherford		1905-09-02—1910-05-26	2 mandates	Rutherford was Alberta's first premier. He and his cabinet were forced to resign due to the Alberta and Great Waterways Railway scandal.
10	Herbert Greenfield		1921-08-13—1925-11-23	1 mandate	The 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.
11	Charles Stewart		1917-10-30—1921-08-13	0 mandates	Stewart was the province's last Liberal premier.
12	Harry Strom		1968-12-12—1971-09-10	0 mandates	Strom was the last Social Credit premier of Alberta.
13	Alison Redford		2011-10-07—2014-03-23	1 mandate
14	Richard Gavin Reid		1934-07-10—1935-09-03	0 mandates	Reid was Alberta's last United Farmer premier.
15	Jim Prentice		2014-09-15—2015-05-24	0 mandates	Prentice was Alberta's last Progressive Conservative premier.
16	Rachel Notley		2015-05-24	1 mandate	Notley is the first NDP Premier
17	Dave Hancock		2014-03-23—2014-09-15	0 mandates	Hancock was chosen as interim party leader during a leadership election.

Graphical representation

Colour Key
	Alberta Liberal Party
	United Farmers of Alberta
	Social Credit Party of Alberta
	Progressive Conservative Association of Alberta
	Alberta New Democratic Party