Olusegun Oni (born 5 September 1954) is a Nigerian politician who served as Governor of Ekiti State from 29 May 2007 to 14 October 2010. He was a member of the ruling People's Democratic Party (PDP). In 2014 he defected from the PDP and joined the newly formed opposition party All Progressive Congress (APC) where He was given the position of Deputy National Chairman South from 2014–2020.