| Official Name: | Kostarevo |
| Native Name: | Костарево |
| Settlement Type: | Selo |
| Pushpin Map: | Russia Volgograd Oblast#Russia |
| Subdivision Type: | Country |
| Subdivision Name: | Russia |
| Subdivision Name1: | Volgograd Oblast |
| Subdivision Name3: | Kamyshinsky District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +4:00 |
| Coordinates: | 50.05°N 101°W[1] |
Kostarevo (Russian: Костарево) is a rural locality (a selo) and the administrative center of Kostarevskoye Rural Settlement, Kamyshinsky District, Volgograd Oblast, Russia. The population was 1,011 as of 2010.[2] There are 12 streets.[3]
Kostarevo is by road on the Volga Upland, on the Ilovlya River, 35 km west of Kamyshin (the district's administrative centre). Petrunino is the nearest rural locality.[4]