The Azadegan League (Persian: ليگ آزادگان, Lig-e Âzâdegân), also known as League 1 (Persian: لیگ یک, Lig-e Yek), is the second highest division of professional football in Iran.

In 1972, the Takht Jamshid Cup was founded as the national league and included teams from all over the country.

Due to the Islamic Revolution and the Iran–Iraq War, the Takht Jamshid Cup was dissolved and also the lower leagues were unorganized.

Saipa won the Azadegan League title, sitting three points of runners-up Persepolis.

Persepolis won the 1999–2000 Azadegan League season, sitting seven points clear of rival Esteghlal.

Shamoushak Noshahr became the champion in 2002–03, while Saba Battery won the league title in the 2003–04 season.

After Shahid Ghandi winning the league in 2004–05, Mes Kerman became the champion in the 2005–06 season.

Sanat Naft Abadan, the third-ranked team in 2004–05, criticized the Iranian Football Federation due to incidents in the final stage.

East Azerbaijan club Tractor returned finally back to the Persian Gulf Cup by winning the 2008–09 season alongside Steel Azin.

Shahrdari Tabriz and Naft Tehran were the champions in the 2009–10 season, before Damash winning the league in 2010–11.

Padideh won the title in 2013–14 after a victory over Naft Masjed Soleyman in the league final.

One season later, Foolad Novin could win the league after they beat Siah Jamegan in final.

Paykan won the 2015–16 season, sitting seven points clear of Machine Sazi.

Naft Masjed Soleyman drew 2–2 with Mes Rafsanjan and won the league, while Nassaji defeated Rah Ahan 6–0 in Tehran's Takhti Stadium and became runners-up with 64 points thanks to a better goal difference than Khooneh be Khooneh.

Notes:1 Saba Qom was formerly known as Saba Battery 2 Shahid Ghandi Yazd was known as Tarbiat Yazd between 2006 and 2015 3 Rahian Kermanshah was formerly known as Shirin Faraz 4 Steel Azin was formerly known as Ekbatan 5 Tractor was formerly known as Tractor Sazi 6 Padideh was known as Shahr Khodrou between 2019 and 2021 Notes:1 Saba Qom was formerly known as Saba Battery 2 Shahid Ghandi Yazd was known as Tarbiat Yazd between 2006 and 2015 3 Rahian Kermanshah was formerly known as Shirin Faraz 4 Steel Azin was formerly known as Ekbatan 5 Tractor was formerly known as Tractor Sazi 6 Padideh was known as Shahr Khodrou between 2019 and 2021 Notes:Only league matches, Play-offs are not included in the all-time table 1 Nassaji Mazandaran was deducted three points in the 2012–13 season 2 Aluminium Arak was formerly known as PAS Arak, Shensa Arak, Hamyari Arak and Shahrdari Arak 3 Malavan was deducted six points in the 2018–19 season 4 Payam Mashhad was deducted three points in the 2010–11 season 5 Damash Gilan was formerly known as Esteghlal Rasht and Pegah Gilan 6 Rayka Babol was formerly known as Khooneh be Khooneh Notes:Matches with spectator bans are not included in average attendances