Obagaji
Benue
Obangede
Kogi
Obarike-Ito
Obi
Nassarawa
Obiaruku
Delta
Obiozara
Ebonyi
Obollo-Afor
Enugu
Obolo-Eke (1)
Obonoma
Rivers
Obubra
Cross River
Obudu
Ochobo
Ode
Ondo
Ode-Ekiti
Ekiti
Ode-Irele
Odeda
Ogun
Odo-Ere
Odogbolu
Odoro Ikpe
Akwa Ibom
Odot
Odukpani
Offa
Kwara
Ogaminana
Ogbede
Ogbere
Ogbia
Bayelsa
Ogbomoso
Oyo
Oghara
Ogidi
Anambra
Ogoja
Ogu
Oguma
Ogurugu
Oguta
Imo
Ogwashi-Uku
Ohafia-Ifigh
Abia
Oji River
Ojota
Lagos
Ojoto
Oju
Oka
Okada
Edo
Oke Ila
Oke Mesi
Osun
Oke-Agbe
Oke-Ikpe
Oke-Oyi
Okehi
Okeho
Okene
Okigwe
Oko Ita
Okopedi
Okoroete
Okpo
Okpoga
Okpoma
Okpuala-Ngwa
Okrika
Okuku
