The 2008–09 Persian Gulf Cup (also known as Iran Pro League) was the 26th season of Iran's Football League and eighth as Iran Pro League since its establishment in 2001. Persepolis were the defending champions. The season featured 15 teams from the 2007–08 Persian Gulf Cup and two new teams promoted from the 2007–08 Azadegan League: Payam Mashhad as champions and Foolad. Damash replaced Pegah. The league started on 4 August 2008 and ended on 26 April 2009. Esteghlal won the Pro League title for the second time in their history (total seventh Iranian title).