| Rank |
Premier |
Incumbency |
Years in power |
Number of Mandates |
Remarks |
| 1 |
Manning Ernest Manning |
&0000000000000025.00000025 years, &0000000000000195.000000195 days |
1943–1968 |
7 mandates |
The longest serving premier, Manning was leader of the Social Credit Party. |
| 2 |
Lougheed Peter Lougheed |
&0000000000000014.00000014 years, &0000000000000052.00000052 days |
1971–1985 |
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 |
Klein Ralph Klein |
&0000000000000014.00000014 years |
1992–2006 |
4 mandates |
|
| 4 |
Brownlee John Edward Brownlee |
&0000000000000008.0000008 years, &0000000000000229.000000229 days |
1925–1934 |
4 mandates |
Brownlee resigned as the result of a sex scandal. |
| 5 |
Aberhart William Aberhart |
&0000000000000007.0000007 years, &0000000000000262.000000262 days |
1935–1943 |
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 |
Sifton Arthur Lewis Sifton |
&0000000000000007.0000007 years, &0000000000000157.000000157 days |
1910–1917 |
1 mandate |
Sifton resigned as premier to join Sir Robert Borden's war cabinet. |
| 7 |
Getty Don Getty |
&0000000000000007.0000007 years, &0000000000000043.00000043 days |
1985–1992 |
2 mandates |
Getty won his seat in the Alberta legislature in the 1989 provincial election but remained premier and re-entered the legislature through a by-election. |
| 8 |
Greenfield Herbert Greenfield |
&0000000000000004.0000004 years, &0000000000000102.000000102 days |
1921–1925 |
1 mandate |
The United Farmers of Alberta did not have a leader when they surprised everyone, including themselves, by winning 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. |
| 9 |
Rutherford Alexander Cameron Rutherford |
&0000000000000004.0000004 years, &0000000000000266.000000266 days |
1905–1910 |
2 mandates |
Rutherford was Alberta's first premier. He and his cabinet were forced to resign due to a railway construction scandal. |
| 10 |
Stewart Charles Stewart |
&0000000000000003.0000003 years, &0000000000000287.000000287 days |
1917–1921 |
1 mandate |
Stewart was the province's last Liberal premier. |
| 11 |
Strom Harry Strom |
&0000000000000002.0000002 years, &0000000000000272.000000272 days |
1968–1971 |
0 mandates |
Strom was the last Social Credit premier of Alberta. |
| 12 |
Stelmach Ed Stelmach (incumbent) |
&0000000000000001.0000001 year, &0000000000000177.000000177 days |
2006– |
1 mandate |
Stelmach is the incumbent prime minister as at June 8, 2008. |
| 13 |
Reid Richard Gavin Reid |
&0000000000000001.0000001 year, &0000000000000055.00000055 days |
1934–1935 |
0 mandates |
Reid was Alberta's last United Farmer premier. |
There was no Premier of Alberta from May 23 until May 31, 1943, due to the death of Premier William Aberhart
