| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Острув-Великопольський | city | Wielkopolskie | Poland | 51.65 | 17.81 | 830 | 80722 |
| Острув-Велькопольски | city | Wielkopolskie | Poland | 51.65 | 17.81 | 830 | 80722 |
| Острув-Велькопольский | city | Wielkopolskie | Poland | 51.65 | 17.81 | 830 | 80722 |
| Острув-Мазовецка | city | Mazowieckie | Poland | 52.80 | 21.90 | 830 | 32823 |
| Острув-Мазовецька | city | Mazowieckie | Poland | 52.80 | 21.90 | 830 | 32823 |
| Оструда | city | Warminsko-Mazurskie | Poland | 53.70 | 19.96 | 403 | 45455 |
| Остружањ | city | Serbia | 44.35 | 19.57 | 830 | 5662 | |
| Остружеще | city | Brestskaya Oblast' | Belarus | 51.99 | 24.27 | 830 | 1513 |
| Остружница | city | Serbia | 44.73 | 20.32 | 311 | 87041 | |
| Оструп | city | Sjaelland | Denmark | 55.81 | 11.62 | 45 | 3734 |