O
- (Nsawam Adoagyiri) Otopokwamikrom
- (Yilo Krobo) Otrokpe
- (Kwaebibirem) Otumi
- (West Akim) Oworom
- (Akyemansa) Oyeso
- (New Juaben) Oyoko
- (Akuapim North) Okrakwajo
- (Lower Manya Krobo) Ofonsi
- (Asuogyaman) Ofotokuasi
- (Birim Central) Oframasi
- (Akyemansa) Ofuasikuma
- (Asuogyaman) Ogoli
- (Yilo Krobo) Ogome
- (Suhum/Kraboa/Coaltar) Okorasi
- (Akuapim North) Okorasi
- (Lower Manya Krobo) Okpesi
- (Kwahu South) Okrajei
- (Kwahu West) Odumase Krobo
- (Upper West Akim) Okumso
- (Yilo Krobo) Okwenya
- (Lower Manya Krobo) Okwenya
- (Lower Manya Krobo) Okwidom
- (Akuapim North) Old Mangoasi
- (East Akim) Old Tafo
- (Fanteakwa) Onuku
- (Yilo Krobo) Onumaku
- (Upper West Akim) Onyamichire