O
- (Cherkasy Raion) Olianyne
- (Uman Raion) Ositna
- (Zvenihorodka Raion) Ozirna
- (Zvenihorodka Raion) Oleksandrivka
- (Cherkasy Raion) Ozerishche
- (Uman Raion) Ostrozhany
- (Uman Raion) Ostrivets
- (Cherkasy Raion) Orlovets
- (Uman Raion) Oradivka
- (Zvenihorodka Raion) Onopriivka
- (Uman Raion) Oksanyna
- (Uman Raion) Okhmativ
- (Uman Raion) Oleksandrivka
- (Zvenihorodka Raion) Orly
- (Zolotonosha Raion) Ostapivka
- (Zolotonosha Raion) Olimpiadivka