Claim: The longest-reigning in the list of premiers or the first minister for Alberta was Ernest Manning with seven mandates counting 25 years and 195 days in office, followed by Peter Lougheed with four mandates serving 14 years and 52 days.
Evidence: The list of premiers of Alberta consists of the 18 leaders of government of the Canadian province of Alberta since it was created in 1905. He served longer than any other premier in the province's history and was the second longest serving provincial premier in Canadian history (only after George H. Murray of Nova Scotia). Ernest Charles Manning, PC CC AOE (September 20, 1908 – February 19, 1996), a Canadian politician, was the eighth premier of Alberta between 1943 and 1968 for the Social Credit Party of Alberta.