| Official Name: | Ostrov |
| Native Name: | Остров |
| Settlement Type: | Khutor |
| Pushpin Map: | Russia Volgograd Oblast#Russia |
| Subdivision Type: | Country |
| Subdivision Name: | Russia |
| Subdivision Name1: | Volgograd Oblast |
| Subdivision Name3: | Surovikinsky District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +4:00 |
| Coordinates: | 48.7167°N 55°W[1] |
Ostrov (Russian: Остров) is a rural locality (a khutor) in Kachalinskoye Rural Settlement, Surovikinsky District, Volgograd Oblast, Russia. The population was 246 as of 2010.[2]
Ostrov is located near the Lisa River, 36 km northeast of Surovikino (the district's administrative centre) by road. Kachalin is the nearest rural locality.[3]