Paul Biya is a Cameroonian politician who is the second president of Cameroon since 6 November 1982, having previously been the prime minister of Cameroon from 1975 to 1982. He is the second-longest-ruling president in Africa, the longest consecutively serving current non-royal national leader in the world and the oldest head of state in the world. He is regarded as an authoritarian leader and dictator.

This article contains various lists of state leaders organized by age, defined as heads of state and/or heads of government.