The Vaga is a river in Totemsky, Syamzhensky, and Verkhovazhsky Districts of Vologda Oblast and in Velsky, Shenkursky, and Vinogradovsky Districts of Arkhangelsk Oblast in Russia. It is a left and the biggest tributary of the Northern Dvina. The length of the river is 575 kilometres (357 mi). The area of its basin 44,800 square kilometres (17,300 sq mi). The main tributaries of the Vaga are the Pezhma (left), the Kuloy (right), the Vel (left), the Ustya (right), the Puya (left), and the Led (left).