O
- (Ayamelum) Okpaga
- (Ayamelum) Omor
- (Idemili South) Oraukwu
- (Oyi) Owele
- (Awka North) Oye Market
- (Anambra West) Otu Ifite
- (Orumba North) Ozu
- (Nnewi South) Ozu
- (Orumba South) Owere-Ezukala
- (Nnewi South) Otu
- (Ihiala) Osuakwa
- (Nnewi South) Osu
- (Ogbaru) Osomari
- (Ihiala) Osonachu
- (Ogbaru) Oshita
- (Anambra West) Oroma Etiti
- (Ekwusigo) Orifite
- (Njikoka) Oraukwu
- (Anambra West) Ode
- (Anambra West) Oronia-Utu
- (Anambra West) Onono
- (Anambra West) Onoia
- (Ayamelum) Omo
- (Ayamelum) Omasi Agu
- (Awka South) Okpuno-Awka
- (Orumba South) Okpulukpu
- (Aguata) Oka
- (Idemili South) Ojoto
- (Ogbaru) Oguaniocho
- (Orumba South) Ogbunka