The 2012–13 Indonesia Super League U-21 season was the fifth edition of Indonesia Super League U-21, a competition that are intended for footballers under the age of twenty-one years.
The competition is divided into four acts consist of two group stages and two knockout rounds, which is the semifinals and final.
The winner advanced to the final to battle for the championship, while two teams who were defeated will play a third-placed match.
(C) = Champion; (R) = Relegated; (P) = Promoted; (O) = Play-off winner; (A) = Advances to a further round.
(C) = Champion; (R) = Relegated; (P) = Promoted; (O) = Play-off winner; (A) = Advances to a further round.