Coursan is a commune in the Aude department in southern France. Coursan station has rail connections to Narbonne, Béziers and Mont…Coursan is a commune in the Aude department in southern France. Coursan station has rail connections to Narbonne, Béziers and Montpellier. It is 7 km from Narbonne on the river Aude. There is a bridge built in the fifteenth century, over which passes the RN9 road. The town has a church from the same period which is in the course of being restored.