The Iranian Basketball Super League (IBSL) is a professional men's basketball league in Iran. It was founded in 1998. The current champions is Shahrdari Gorgan. The league follows the promotion and relegation system in which the worst two teams are relegated to 1st Division.

Gorgan is a city in the Central District of Gorgan County, Golestan province, Iran, serving as capital of the province, the county, and the district. It lies approximately 400 km (250 mi) to the northeast of the national capital Tehran, and some 30 km (19 mi) away from the Caspian Sea.