List of governors of Osun State

The governor of Osun State is the head of government of Osun State in Nigeria. The governor is the head of the executive branch of the Osun State Government. The governor has a duty to enforce state laws and the power to either approve or veto bills passed by the Osun State [House of Assembly], to convene the legislature and grant pardons.
When Osun State was created from Oyo State in 1991, Colonel Leo Segun Ajiborisha was appointed its first head of State. Isiaka Adetunji Adeleke was the first civilian governor, serving for two years from January 2, 1992 to November 1993. Bisi Akande served from 1999 to 2003. Olagunsoye Oyinlola served from 2003 to 2010. Rauf Aregbesola served the longest term as governor, serving for two consecutive terms of four years each from 2010 to 2014, and 2014 to 2018. Gboyega Oyetola served from 2018 to 2022.
Since the creation of the state in 1991, ten people have served as governor: four military and six civilian. Ajiborisha served the shortest term in office of four months.
The current governor is Ademola Adeleke, who was sworn in on 27 November 2022.

Governors

Military governor (1991–1992)

Osun State was created on 27 August 1991, and General Ibrahim Babangida appointed Leo Segun Ajiborisha as military governor.

Third Republic (1992–1993)

Under the 1979 Constitution, the second constitution of the Federal Republic of Nigeria, the governor was head of both state and government. The governor was elected for a four-year term. In the event of a vacancy, the deputy governor would serve as acting governor.

Military administrators (1993–1999)

led the palace coup d'ètat of 1993 which overthrew the Third Republic. He appointed his military administrators in December 1993.

Fourth Republic (1999–present)

Under the 1999 Constitution of the Federal Republic of Nigeria, the governor is head of both state and government. The governor is elected for a four-year term. In the event of a vacancy, the deputy governor would serve as acting governor.