Lake Volgo is a lake in Ostashkovsky, Penovsky, and Selizharovsky Districts of Tver Oblast, Russia. The Volga River flows through the lake in its upper course. The lake has a surface area of 61 square kilometres (24 sq mi), and the area of its drainage basin is 3,500 square kilometres (1,400 sq mi). The urban-type settlement of Peno is located on the western bank of the lake.