| City | Region |
|---|
| ›Ongoni | Nzwani (Anjouan) Island› |
| ›Ongoujou | Nzwani (Anjouan) Island› |
| ›Ouallah | Mwali (Moheli) Island› |
| ›Ouallah-Mirereni | Mwali (Moheli) Island› |
| ›Ouanani | Mwali (Moheli) Island› |
| ›Ouani | Nzwani (Anjouan) Island› |
| ›Ouani Anjouan Airport | Nzwani (Anjouan) Island› |
| ›Ouela | Njazidja (Grande Comore)› |
| ›Ouela | Njazidja (Grande Comore)› |
| ›Ouella | Njazidja (Grande Comore)› |
| ›Ouemani | Njazidja (Grande Comore)› |
| ›Ouhozi | Njazidja (Grande Comore)› |
| ›Ouroveni | Njazidja (Grande Comore)› |
| ›Oussivo | Njazidja (Grande Comore)› |
| ›Outsa | Nzwani (Anjouan) Island› |
| ›Ouzini | Nzwani (Anjouan) Island› |
| ›Ouzio | Njazidja (Grande Comore)› |
| ›Ouziouani | Njazidja (Grande Comore)› |
