Iranian football's 2nd division (Persian: ليگ دسته دوم ایران) is the third-highest football division overall in the Iranian football league system. Before 2001, the 2nd division league was the second-highest division in the national football league system. However, it was changed to third-highest division when Iran's football structure officially became professional.

The league consists of two, 14-team groups who play each other twice in a home and away format. The first- and second-placed teams in each group are automatically promoted to the Azadegan League. The bottom two teams in both groups are automatically relegated to the 3rd division.

If teams in the promotion or relegation spots are tied in terms of points, a home and away series will be played. The team with the best aggregate score will either avoid relegation or win promotion.

Sometimes these rules are not followed exactly. For example in the 2005–06 season, Deihim Ahvaz should have been relegated, but Nozhan Mazandaran despite finishing ahead of Deihim, were relegated instead because of the club's poor financial situation. Additionally the number of teams in each group was increased from twelve to fourteen this season.

• 12 clubs: 2002–2003
• 24 clubs: 2003–2004
• 20 clubs: 2004–2005
• 24 clubs: 2005–2006
• 28 clubs: 2006–2008
• 36 clubs: 2008–2010
• 32 clubs: 2010–2011
• 28 clubs: 2011–2014
• 40 clubs: 2014–2016
• 37 clubs: 2016–2017
• 33 clubs: 2017–2018
• 26 clubs: 2018–2019
• 28 clubs: 2019–

• 1972–73: Taj Ahvaz
• 1973–74: Sepahan
• 1974–75: Tractor
• 1975–76: Machine Sazi
• 1976–77: Rah Ahan
• 1977–78: Aboomoslem
• 1978–79: did not finish

• 1990–91: Malavan (A), Aboomoslem (B), Taam Esfehan (C), Esteghlal Ahvaz (D)
• 1991–92: Bargh Shiraz
• 1992–93: Chooka Anzali
• 1993–94: Naft Ghaemshahr
• 1994–95: Bahman Karaj
• 1995–96: Payam Mashhad (A) and Sanat Naft Abadan (B)
• 1996–97: Fajr Sepasi
• 1997–98: Malavan
• 1998–99: Bahman Karaj
• 1999–00: Bargh Shiraz
• 2000–01: Aboomoslem

• 2001–02: -
• 2002–03: Shahid Ghandi
• 2003–04: Sanati Kaveh (National Group) and Pasargad Tehran (Region Groups/North) and Deyhim Ahvaz (Region Groups/South)
• 2004–05: Shahrdari Langarudn (A) and Pegah Khozestan (B)
• 2005–06: Pegah Tehran (A) and Etka Gorgan (B)
• 2006–07: Sepahan Novin (A) and Bargh Tehran (B)
• 2007–08: Aluminium Hormozgan
• 2008–09: Sanati Kaveh (A) and Mes Sarcheshmeh (B)
• 2009–10: Sepidrood Rasht
• 2010–11: Esteghlal Jonub
• 2011–12: Esteghlal Ahvaz
• 2012–13: Naft Gachsaran (A) and Siah Jamegan (B)
• 2013–14: Shahrdari Ardabil (A) and Etka Gorgan (B)
• 2014–15: Aluminium Arak
• 2015–16: Oxin Alborz (A) and Sepidrood Rasht (B)
• 2016–17: Shahrdari Tabriz (A) and Shahrdari Mahshahr (B)
• 2017–18: Karoon Arvand Khorramshahr (A) and Shahin Bushehr (B)
• 2018–19: Khooshe Talaee
• 2019–20: Chooka Talesh
• 2020–21: Mes Shahr-e Babak
• 2021–22: Chooka Talesh
• 2022–23: Naft va Gaz Gachsaran
• 2023-24: Nirooye Zamini Tehran

• IPL
• Azadegan League
• Iran Football's 3rd Division
• Iranian Super Cup
• Hazfi Cup
• Iranian Futsal Super League
• Iran Futsal's 1st Division
• Iran Futsal's 2nd Division

• (in English) League 2 Iran | Results, Fixtures, Standings, Players ...
• (in Persian) Unofficial Fans Site. Archived 2007-10-12 at the Wayback Machine.

v t e Football in Iran
League competitions	Persian Gulf Pro League Azadegan League League 2 League 3 Provincial Leagues Ardabil Provincial League Bushehr Province League East Azarbaijan Province League Gilan Province League Golestan Province League Khuzestan Premier League Tehran Province League Kowsar league (women's) Futsal Beach soccer
Cup competitions	Hazfi Cup Super Cup
Defunct competitions	Takht Jamshid Cup
National teams	Men's B-team Women's M U-23 M U-20 W U-20 M U-17 W U-17 M Futsal W Futsal M U-20 Futsal M Beach
Lists and categories	League system Champions List of clubs List of venues Managers List of managers League winners Cup winners football award winners List of highest payments Top goalscorers all-time by season Clubs in the AFC Champions League
Records List of clubs List of venues International players Men Women

v t e Iranian Sport leagues
Basketball	Men Super League 1st Division Women Super League 1st Division
Football	Men Pro League Azadegan League 2nd Division 3rd Division Provincial Leagues Women Pro League 1st Division
Futsal	Men Super League 1st Division 2nd Division Women Premier League
Handball	Men Super League 1st Division Women Premier League
Volleyball	Men Super League 1st Division Women Super League
Water polo	Super League
Wrestling	Premier League