The Kan (Russian Кан) river is a 390 mile (629 km) long tributary of the Yenisei River in Siberia, Russia. It drains a basin of 36,900 km².
The headwaters of the river rise in the Sayan Mountains and flow from there in a northerly direction through Kansk and then in a westerly direction through Zelenogorsk, entering Yenisei at Ust-Kan (43 miles (70 km) north-east of Krasnoyarsk).