The Medveditsa () is a river in Spirovsky, Likhoslavlsky, Rameshkovsky, Kashinsky, and Kimrsky Districts of Tver Oblast, Russia, a left tributary of the Volga (joining the Volga at the Uglich Reservoir).
The Medveditsa River is a significant waterway in the region of Tver Oblast, Russia, and plays a role in the larger Volga river system.