The Great Tsivil[a] or simply Tsivil (also spelled Tzivil and Civil /sɪˈvɪl/), is a river in Chuvashia, Russian Federation, a right tributary of the Volga in its lower course.

The Tsivil is 170 km (110 mi) long, and its watershed area is 4,690 km2 (1,810 sq mi).

Other major tributaries are the Unga and Kuganar.

Tsivil's yearly runoff volume is 640,000,000 m3 (520,000 acre⋅ft).

This article related to a river in Southern Russia is a stub.