The Kalakan (Russian: Калакан) is a river in Transbaikalia, southern East Siberia, Russia.

Taimen and lenok are among the fish species found in the river.

Its sources are in the Kalakan Range, at the eastern edge of the Vitim Plateau, where it flows first to the north.

After a short distance it bends to the left and flows in a WSW direction along the feet of the Yankan Range, which separates it from the course of the Kalar to the north.

There are 96 lakes with a total area of 2.3 square kilometres (0.89 sq mi) in the basin of the Kalakan.