Kem (Russian: Кемь) is a river in Krasnoyarsk Krai, Siberia, Russia. It is a left bank tributary of the Yenisey.
The name of the river Kem comes from the ancient word kem or hem that has a meaning of great river. This toponymy is very popular and widespread from Siberia up to Karelia and Finland.
The river flows across the West Siberian Plain through the districts of Bolshemurtinsky, Kazachinsky, Pirovsky, and Yeniseysky District before discharging into the Yenisei River close to the town of Yeniseysk at 2045 kilometers before the mouth. The Kem is 356 kilometres long. Its drainage basin covers a total area of 8,940 square kilometres.
