Shushtar (Persian: شوشتر) is a city in the Central District of Shushtar County, Khuzestan province, Iran, serving as capital of both the county and the district.
Shushtar is an ancient fortress city, approximately 92 kilometres (57 mi) from Ahvaz, the centre of the province. Much of its past agricultural productivity derives from the irrigation system which centered on the Band-e Kaisar, the first dam bridge in Iran. The whole water system in Shushtar consists of 13 sites called Shushtar Historical Hydraulic System which is registered as a Unesco World Heritage Site.