The Kunduz River (Persian: رود قندوز) is a tributary of the Amu Darya in northern Afghanistan.
It flows east in a deep valley separating the western part of the Hindu Kush on the north from the Koh-i-Baba on the south.
It then parallels a northern spur of the Hindu Kush for more than 80 km, receiving many small tributaries on its right bank.
At the town of Doshi it receives the Andarab, a large tributary flowing from the east.
After passing through the cities of Puli Khumri and Baghlan, it enters Kunduz Province.