The article contains information about the 2011–12 Iran 3rd Division football season. This is the 4th rated football league in Iran after the Persian Gulf Cup, Azadegan League, and 2nd Division. The league competition started from 2 October 2011. From the First Round, 12 teams go through the Second Round. From that round four team will be promoted directly to 2012–13 Iran Football's 2nd Division, and two teams go through the play-off where the winner also will be promoted.