O
- (Saki West) Okoto
- (Itesiwaju) Okose
- (Ido) Okose
- (Atiba) Okoro
- (Ogbomosho North) Oko-Oba
- (Ori Ire) Okomaro
- (Ibarapa East) Okolo
- (Iwajowa) Okofori
- (Ogo Oluwa) Oko-Ede
- (Atisbo) Oko-Basi
- (Ori Ire) Oko
- (Ogo Oluwa) Oko
- (Ibarapa North) Oko
- (Ido) Oko
- (Oluyole) Okiti
- (Ogbomosho South) Okin
- (Oyo West) Okikiola
- (Ona Ara) Okikiade
- (Afijio) Oketokun
- (Iwajowa) Oke-Sunsun
- (Iwajowa) Oke-Su
- (Afijio) Okeseni
- (Atisbo) Okesanya
- (Ido) Okepupa
- (Ibarapa Central) Oke-Osu
- (Ori Ire) Oke-Oran
- (Oyo East) Oke-Odo
- (Ibarapa East) Oke-Olowo
- (Ibarapa Central) Oke-Olola
- (Ona Ara) Oke-Ogun