# 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 governor. Rauf Aregbesola served the longest term as governor, serving for two consecutive terms of 4 years from 2010 to 2018.
Since the creation of the state in 1991, 10 people have served as governor, 4 military governors and 6 civilian governors. Ajiborisha served the shortest term in office of 4 months.
The current governor is Ademola Adeleke, he 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.
| Governor | Governor | Governor | Term of office | Term of office | Term of office | Party | Ref. |
| No. | Portrait | Name (birth–death) | Took office | Left office | Time in office | Party | Ref. |
| 1 | | Colonel Leo Segun Ajiborisha | 27 August 1991 | 3 January 1992 | 4 months | Military | |

### Third Republic (1992–1993)

Under the 1979 Constitution, the second constitution of the Federal Republic of Nigeria, the governor was both head of state and government. The governor was elected for a four-year term. In the event of a vacancy the deputy governor would have served as acting governor.
| Governor | Governor | Governor | Term of office | Term of office | Term of office | Political party | Elected | Ref. |
| No. | Portrait | Name (birth–death) | Took office | Left office | Time in office | Political party | Elected | Ref. |
| 2 | | Isiaka Adeleke (1955–2017) | 3 January 1992 | 17 November 1993 | 1 year, 318 days | Social Democratic Party | 1991 | |

### Military administrators (1993–1999)

General Sani Abacha led the palace coup d'ètat of 1993 which overthrew the Third Republic. He appointed his military administrators in December 1993.
| Administrator | Administrator | Administrator | Term of office | Term of office | Term of office | Party | Ref. |
| No. | Portrait | Name (birth–death) | Took office | Left office | Time in office | Party | Ref. |
| 3 | | Navy Captain Anthony Udofia | 9 December 1993 | 22 August 1996 | 2 years, 8 months | Military | |
| 4 | | Lieutenant Colonel Anthony Obi (1952–2022) | 22 August 1996 | 7 August 1998 | 1 year, 11 months | Military | |
| 5 | | Colonel Theophilus Bamigboye (born 1951) | 7 August 1998 | 29 May 1999 | 9 months | Military | |

### Fourth Republic (1999–present)

Under the 1999 Constitution of the Federal Republic of Nigeria, the governor is both head of 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.
| Governor | Governor | Governor | Term of office | Term of office | Term of office | Political party | Elected | Ref. |
| No. | Portrait | Name (birth–death) | Took office | Left office | Time in office | Political party | Elected | Ref. |
| 6 | | Chief Adebisi Akande (born 1939) | 29 May 1999 | 29 May 2003 | 4 years | Alliance for Democracy | 1999 | |
| 7 | | Olagunsoye Oyinlola (born 1951) | 29 May 2003 | 26 November 2010 | 7 years, 181 days | Peoples Democratic Party | 2003 2007 | |
| 8 | | Rauf Aregbesola (born 1957) | 27 November 2010 | 27 November 2018 | 8 years | All Progressives Congress | 2014 | |
| 9 | | Gboyega Oyetola (born 1954) | 27 November 2018 | 27 November 2022 | 4 years | All Progressives Congress | 2018 | |
| 10 | | Ademola Adeleke (born 1960) | 27 November 2022 | Incumbent | 1 year, 317 days | Peoples Democratic Party | 2022 | |