O
- (Isiala Mbano) Okohia
- (Oguta) Osoji
- (Mbatoli) Orieama
- (Oguta) Ossu-Obodo
- (Oguta) Oguta II
- (Oru West) Otulu
- (Oguta) Okwu-Ogbaku
- (Mbatoli) Orieubi
- (Ngor-Okpala) Obor
- (Aboh-Mbaise) Obaku
- (Mbatoli) Obazu
- (Owerri North) Owala
- (Ihitte/Uboma) Onicha
- (Mbatoli) Ohi
- (Okigwe) Ogele
- (Ideato North) Obodo
- (Ideato North) Owerri Akokwa
- (Mbatoli) Ogbaku
- (Owerri North) Obeke
- (Ohaji/Egbema) Obeaka
- (Orlu) Obibi
- (Ngor-Okpala) Obike
- (Ikeduru) Obilokwu Mbieri
- (Owerri West) Obinze
- (Owerri West) Obuogwu
- (Ohaji/Egbema) Oburugo
- (Owerri West) Olokwu
- (Owerri West) Okolochi
- (Owerri West) Opala
- (Owerri West) Oforola