Since Nigeria became a republic in 1963, 14 individuals have served as head of state of Nigeria under different titles. The incumbent president Bola Tinubu is the nation's 16th head of state. Olusegun Obasanjo and Muhammadu Buhari both served two non-consecutive periods as head of state, first as military officers and then later as civilians. The first ceremonial president, who served during the first republic was Nnamdi Azikiwe, while the first executive president of Nigeria was Shehu Shagari, he was also the first president to be elected to the position.
