Full form of ISL is Indian Super League.

The Indian Super League (ISL) may be a football league in India. At the top of the year Indian League System, it is one of the country's premier football league competitions together with the I-League.

The league is currently contested by ten teams and each season runs from October to March. Each team currently plays 18 matches during the league stage, with the highest four qualifying for the playoffs. The season then culminates with the ISL Final to work out the champion.

The league has been officially knowns as the Hero Indian Super League since it's inception, due to a sponsorship agreement with Hero Motocorp.