The Osuga () is a river in Selizharovsky, Kuvshinovsky, Torzhoksky, and Spirovsky Districts of Tver Oblast of Russia, a right tributary of the Tvertsa.
The Osuga River is a waterway that runs through the regions of Selizharovsky, Kuvshinovsky, Torzhoksky, and Spirovsky in Tver Oblast, Russia, connecting with the larger Tvertsa River system.