List of premiers of Alberta by time in office

Premiers of Alberta by time served in office as of August 12, 2025. The premier always stays in office during an election campaign. That time is included in the total, even if the premier is defeated.

Rank	Name	Incumbency	Terms of office[a]		Mandates	Party
1	Ernest Manning	25 years, 195 days	May 31, 1943	December 12, 1968	7	█ Social Credit
2	Peter Lougheed	14 years, 52 days	September 10, 1971	November 1, 1985	4	█ Progressive Conservative
3	Ralph Klein	14 years, 0 days	December 14, 1992	December 14, 2006	4	█ Progressive Conservative
4	John Edward Brownlee	8 years, 229 days	November 23, 1925	July 10, 1934	2	█ United Farmers
5	William Aberhart	7 years, 262 days	September 3, 1935	May 23, 1943	2	█ Social Credit
6	Arthur Sifton	7 years, 157 days	May 26, 1910	October 30, 1917	2	█ Liberal
7	Don Getty	7 years, 42 days	November 1, 1985	December 13, 1992	2	█ Progressive Conservative
8	Ed Stelmach	4 years, 297 days	December 14, 2006	October 7, 2011	1	█ Progressive Conservative
9	Alexander Cameron Rutherford	4 years, 266 days	September 2, 1905	May 26, 1910	2	█ Liberal
10	Herbert Greenfield	4 years, 102 days	August 13, 1921	November 23, 1925	1[b]	█ United Farmers
11	Rachel Notley	3 years, 341 days	May 24, 2015	April 30, 2019	1	█ New Democratic
12	Charles Stewart	3 years, 287 days	October 30, 1917	August 13, 1921	0	█ Liberal
13	Jason Kenney	3 years, 164 days	April 30, 2019	October 11, 2022	1	█ United Conservative
14	Danielle Smith (incumbent)	2 years, 305 days	October 11, 2022	Present	1	█ United Conservative
15	Harry Strom	2 years, 272 days	December 12, 1968	September 10, 1971	0	█ Social Credit
16	Alison Redford	2 years, 167 days	October 7, 2011	March 23, 2014	1	█ Progressive Conservative
17	Richard Gavin Reid	1 year, 55 days	July 10, 1934	September 3, 1935	0	█ United Farmers
18	Jim Prentice	251 days	September 15, 2014	May 24, 2015	0	█ Progressive Conservative
19	Dave Hancock	176 days	March 23, 2014	September 15, 2014	0	█ Progressive Conservative

Notes

1. There was no premier of Alberta from May 23 until May 31, 1943, due to the death of Premier Aberhart.
2. The United Farmers of Alberta won the 1921 election without a leader. Greenfield was made leader immediately afterward, and this election is counted as a win for Greenfield.