O
- (Ika North East) Owa-Eke
- (Ika South) Obi-Deke
- (Ughelli North) Otokotu
- (Isoko North) Ogwewho
- (Ukwuani) Obiogo
- (Ndokwa West) Obi-Obawu
- (Ethiope East) Okoh Ikoro
- (Ethiope East) Okoh Itukperi
- (Ughelli North) Okoh Ondhwakpor
- (Ughelli North) Okoh Unoh
- (Ethiope East) Okoh Ekrudu
- (Ughelli North) Oteri-Urhuagbesa
- (Ughelli North) Ovara-Umusu
- (Ughelli North) Oromuru
- (Ethiope East) Okoh Egbogho
- (Ethiope East) Okoh Uti
- (Ethiope East) Okoh Khikirhe
- (Ethiope East) Okoh Idjerhe
- (Ethiope East) Okon Urhuokpe
- (Ughelli North) Okoh Idiovwa
- (Ughelli North) Ovara-Unukpo
- (Ughelli North) Onyobru
- (Ughelli North) Orogun
- (Ughelli North) Orhokpokpo
- (Ughelli North) Otorhogba
- (Ughelli North) Odovie
- (Ughelli North) Ofuoma
- (Ughelli North) Oteri
- (Ughelli North) Ophori
- (Ughelli North) Oghara