The Clain (French pronunciation: [klɛ̃]; Occitan: Clen) is a 144 km (89 mi) long river in western France, a left tributary of the river Vienne.[1] Its source is near Hiesse, Charente.
The Clain flows generally north, through the following departments and towns:
It joins the Vienne near Châtellerault, Cenon-sur-Vienne.
Among its tributaries are the Boivre, the Clouère and the Vonne.
