Olabisi Onabanjo University, Ago-Iwoye is a state-owned university in Ago-Iwoye, Ogun State, Nigeria. It was founded on 7 July 1982 originally as Ogun State University (OSU) before being renamed to its current name on 29 May 2001, in honour of Olabisi Onabanjo, whose efforts as the then civilian governor of Ogun State helped establish the university. Many students still refer to the institution as OSU, an acronym for the former name.