Top 20 Longest Serving Presidents in the World

6. Hun Sen – Cambodia: 29 years in power

Hune Sen is the current Prime Minister of Combodia. He is serving in this capacity from January 1985. He is the longest serving non-royal leader in Southeast Asia.

5. Paul Biya – Cameroon: 31 years in power

Paul Biya, who served as the Prime Minister, and is now serving as the President of Cameroon. His tenure began on 30th June 1975. Paul Biya is a native of Camaroon’s south. He served as a bureaucrat under President Ahmadou Ahidjo in the 1960s. He was a Secretary General of the Presidency from 1968 to 1975. He became the Prime Minister of Cameroon in 1975 and served in that capacity till 1982, when he assumed the Office of the President.