Kashan River is the left tributary of Murghab River in the Central Asian states of Afghanistan and Turkmenistan.
[1] Kashan River flows into Badghis province, northwest of Afghanistan on the northern side of the Selseleh-ye Safīd Kūh (ancient name: Paropamisus ).
From the north it flows to Turkmenistan and into the Murghab River close to Tagtabazar.