There is one place named Ostrovsk in Ukraine.
All places in the world called "Ostrovsk".
Ivanovka (22)
Antonovka (21)
Kamenka (20)
Mikhaylovka (20)
Aleksandrovka (20)
Kalinovka (19)
Andreyevka (19)
Nikolayevka (19)
Tarasovka (19)
Fedorovka (18)
Alekseyevka (18)
Semënovka (18)
Maryanovka (18)
Pavlovka (17)
Dmitrovka (17)
Krasnoye (17)
Popovka (16)
Ulyanovka (16)
Sofiyevka (16)
Konstantinovka (16)
Bogdanovka (16)
Zhovtnevoye (15)
Vladimirovka (15)
Vasilyevka (15)
Sosnovka (15)
Stepanovka (15)
Berëzovka (15)
Grigoryevka (14)
Novoukrainka (14)
Gorodishche (14)