Ostrov
Ostrov, Constanța
Ostrov, Russia
Ostrov Sokrovishch
Žitný ostrov
Ostrov Bolshevik (air base)
Ostrov, Piešťany District
Ostrov (Karlovy Vary District)
Sredny Ostrov Airfield
Ostrov, Ostrovsky District, Pskov Oblast
Ostrov (Havlíčkův Brod District)
Stadion Střelecký ostrov
Ostrov u Bezdružic
Ostrov, Sobrance District
Ostrov (Příbram District)
Losiny Ostrov National Park
Ostrov (Benešov District)
Ostrov (Ústí nad Orlicí District)
Ostrov Castle
Ostrov Amel'kina Griva
Ostrov nad Oslavou
Ostrov, Tulcea
Ostrov u Macochy
Ostrov (administrative district)
Ostrov Dolgy
Apricot Island
Krasny Ostrov
Ostrov air base
Aptekarsky Ostrov
Ostrov, Volgograd Oblast
Ostrov (Chrudim District)
Zelyony Ostrov
Krestovsky Ostrov (Saint Petersburg Metro)
Ostrov (Slovak TV series)
Ostrov, Vladimir Oblast
Kamenny Islands
Ostrov Bolshoy Oleny
Ostrov, Vashkinsky District, Vologda Oblast
Ostrov orliaka morského (nature reserve)
Ostrov Theatre
Kopáčsky ostrov
Robinsonův ostrov
Yunosti Island
Robinsonův ostrov 2017
Ognenny Ostrov
Nərimanabad, Lankaran
Hooker Island
St. Thomas Island
Graham Bell Island
Balsha Island
Robinsonův ostrov 2018
Wilczek Island
Partizan Island
Ostrov Dekabristov Municipal Okrug
Topografov Island
Aptekarsky Ostrov Municipal Okrug
Lodochnyy Island
Chechen Island
Northbrook Island
The Island (2006 film)
Jackson Island
Vozrozhdeniya Island
Big Diomede Island
Kolguyev Island
Dark Planet (Russian film)
Vasilyevsky Island
Pirallahı, Baku
Orekhovy Island
Dikson Island
Chilia Veche
Morzhovets Island
Medny Island
Alexandra Land
Rudolf Island
Trukhaniv Island
Hiiumaa
Tyuleny Island
Zemlya Georga
List of rural localities in Vologda Oblast
List of craters on Mars: O–Z