The 2011–12 Azadegan League was the 21st season of the Azadegan League and 11th as the second highest division since its establishment in 1991. The season featured 21 teams from the 2010–11 Azadegan League, three new teams relegated from the 2010–11 Persian Gulf Cup: PAS Hamedan, Paykan and Steel Azin and three new teams promoted from the 2010–11 2nd Division: Saipa Shomal as champions, Niroye Zamini and Parseh Tehran. Esteghlal Khuzestan replaced Esteghlal Jonoub Tehran. Damash Lorestan changed their name into Gahar Zagros while Hamyari Arak changed their name into Shahrdari Arak. The league started on 14 September 2011 and ended on 19 April 2012. Paykan won the Azadegan League title for the first time in their history. Paykan, Aluminium Hormozgan and Gahar Zagros promoted to the Persian