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- (Nizhyns’ka Mis’krada) Oster
- (Nizhyns’ka Mis’krada) Olenivka
- (Chernihiv Raion) Oleksandrivka Druha
- (Novhorod-Sivers’ka Mis’krada) Oleksandrivka
- (Chernihiv Raion) Oleksandrivka
- (Koriukivskyi Raion) Oleksandrivka
- (Novhorod-Sivers’ka Mis’krada) Osove
- (Chernihiv Raion) Oleksandrivka
- (Koriukivskyi Raion) Ozeredy
- (Koriukivskyi Raion) Oliinyky
- (Chernihiv Raion) Openky
- (Chernihiv Raion) Oleksiivshchyna
- (Nizhyns’ka Mis’krada) Osokorivka
- (Koriukivskyi Raion) Ovcharivka
- (Nizhyns’ka Mis’krada) Opolonske
- (Nizhyns’ka Mis’krada) Obirky
- (Nizhyns’ka Mis’krada) Ostriv
- (Nizhyns’ka Mis’krada) Oleksiivka
- (Chernihiv Raion) Ozerne
- (Nizhyns’ka Mis’krada) Oleksandrivka
- (Nizhyns’ka Mis’krada) Osovets
- (Prylutskyi Raion) Odnolkiv
- (Prylutskyi Raion) Onykiivka
- (Prylutskyi Raion) Onyshchenkiv
- (Prylutskyi Raion) Oleksyntsi
- (Prylutskyi Raion) Obukhove
- (Prylutskyi Raion) Osnova
- (Prylutskyi Raion) Okhynky
- (Chernihiv Raion) Otrokhy
- (Chernihiv Raion) Omelianiv