O
- (Abakaliki) Okpuitomo
- (Ishielu) Okpoto
- (Ohaozara) Okposi
- (Ohaukwu) Okposhi-Mgbo
- (Afikpo South) Okporojo
- (Ohaukwu) Okporo
- (Afikpo North) Okpoha
- (Afikpo North) Okpo-Ezi
- (Ohaukwu) Okpoduma
- (Izzi) Okpoduma
- (Abakaliki) Okparo
- (Ishielu) Okopoto-Agu
- (Abakaliki) Okum
- (Ebonyi) Okirigwe
- (Abakaliki) Okaria
- (Izzi) Ojiegbe
- (Ebonyi) Ojiegbe
- (Izzi) Ohoke
- (Ishielu) Ohofia-Agba
- (Ikwo) Ohike
- (Ikwo) Ohankwu
- (Izzi) Ohagulode
- (Abakaliki) Ohachikwe
- (Abakaliki) Oguzuruonweya
- (Ohaozara) Ogo Ubi
- (Afikpo North) Ogo Ubi
- (Ebonyi) Ogbaga
- (Ikwo) Ofurekpe
- (Izzi) Ofiaokuma
- (Izzi) Ofianko