2009–10 Indonesia Super League U-21

The 2009–10 Indonesia Super League U-21 season will be the second edition of Indonesia Super League U-21 (ISL U-21), a companion competition Indonesian super league that are intended for footballers under the age of twenty-one years. Pelita Jaya U-21 is the defending champion in this season. Djarum, an Indonesian tobacco company will continue its participation as the competition's main sponsor.

2009–10 Indonesia Super League U-21

The 2009–10 Indonesia Super League U-21 season will be the second edition of Indonesia Super League U-21 (ISL U-21), a companion competition Indonesian super league that are intended for footballers under the age of twenty-one years. Pelita Jaya U-21 is the defending champion in this season. Djarum, an Indonesian tobacco company will continue its participation as the competition's main sponsor.