O
- (Podilsk Raion) Oleksiivka
- (Podilsk Raion) Oleksandrivka
- (Podilsk Raion) Oleksandrivka
- (Rozdilna Raion) Olenivka
- (Berezivka Raion) Oleksandrivka
- (Berezivka Raion) Oleksiyivka
- (Rozdilna Raion) Onylove
- (Berezivka Raion) Osynivka
- (Podilsk Raion) Olenivka
- (Odeskyi Raion) Onyskove
- (Podilsk Raion) Obzhyle
- (Bolhrad Raion) Oksamytna
- (Podilsk Raion) Oleksiivka
- (Izmail Raion) Ostrivne
- (Bilhorod-Dnistrovskyy Raion) Oleksiivka
- (Bilhorod-Dnistrovskyy Raion) Oleksandrivka
- (Bolhrad Raion) Orijivka
- (Bolhrad Raion) Oleksandrivka
- (Podilsk Raion) Osychky
- (Izmail Raion) Orlivka
- (Odeskyi Raion) Oleksandrivka
- (Izmail Raion) Ozerne
- (Odeskyi Raion) Oleksandrivka
- (Odeskyi Raion) Ovidiopol
- Odesa