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.
The Valiahd Cup (Prince Cup) was the first Iranian basketball league where clubs from all around the country competed to win the title. This league was abandoned after the Iranian Revolution in 1979.