O
- (Akoko-Edo) Oguga
- (Ovia North-East) Ogua
- (Ikpoba-Okha) Ogua
- (Etsako Central) Ogonosi
- (Etsako Central) Ogonmeri
- (Oredo) Ogiza
- (Ovia South-West) Ogirifulaba
- (Egor) Oghoghugbo
- (Ovia South-West) Oghogho
- (Ovia North-East) Ogheghe
- (Ovia North-East) Oghehe
- (Egor) Ogboyoko
- (Etsako Central) Ogbona
- (Ovia South-West) Ogboin
- (Ovia North-East) Ogbogiobo
- (Owan East) Ogbodo
- (Etsako West) Ogbida
- (Ovia North-East) Ogbesse
- (Ikpoba-Okha) Ogbe-Orogho
- (Ovia North-East) Ogbede
- (Akoko-Edo) Ogbe
- (Orhionmwon) Ogbahu
- (Owan West) Ogbagun
- (Oredo) Ogba
- (Orhionmwon) Ogba
- (Orhionmwon) Ogan
- (Uhunmwonde) Ogaga
- (Uhunmwonde) Oghada
- (Ovia North-East) Ofunmengbe
- (Etsako East) Ofugbo