2008–2015

Previously, the league was formatted as a neutral venue competition with teams split into groups in which all the groups play in one stadium each. The final round is contested in a double round-robin format, after which the top two teams get promoted to the I-League.

2015–2017

The I-League core committee approved the plans for the 2015–2016 I-League 2nd division matches to be played on a home and away basis. The preliminary rounds will be played as the conference system with the teams being divided into Eastern and Western conferences. Top 3 teams from each conference will qualify for the final round of the 2015–2016 season of 2nd division I-League.^[8]

To widen the football map of the country and to bolster the football structure, I-League committee decide to launch the 2nd division qualifier for 2016–2017 season. Participants from all the state associations would be invited to take part in 2nd division 2016–17 qualifiers. The state associations need to nominate two teams with best results, apart from the teams who would compete in Hero I-League and 2nd division league, from the state leagues to compete in the 2nd division qualifiers. The teams will fight it out amongst themselves in the zonal round followed by the final round. Eventually top two teams from the final round will get a nod to the 2nd division, provided that they fulfill the club licensing requirements in the due time.^[9]

2017–2018

The format was further altered from 2017–2018 season, the league was divided in two stages: the Preliminary and the Final. The tournament will also feature reserve teams of Indian Super League clubs. In the preliminary stage, 18 teams are divided into three groups where all matches would be played on a home and away basis. The winners of each group plus the best second-placed team would qualify for the final round. However, if reserve teams of ISL clubs finishes as winners or runners-up in any group, the position is passed on onto the next non-ISL team. The final round will be played at a central venue, the winners of which would be promoted to the next tier of Indian Football.^[10]

2018–2019

Sixteen teams were allowed to participate in this season by the league committee.^[11]

2021

A new format was introduced named as I-league qualifiers. 10 teams promoted from state leagues battled for I-league qualification.

2022–2023

In a meeting held on 16 December 2022, the AIFF league committee has recommended that states that have conducted their regional leagues in previous season nominate clubs for the Hero I-League 2, with six reserve teams of the Hero ISL also joining them. A pre-tournament qualifier was held for the teams from states that have not conducted their leagues in 2021–22, from which the top two teams gained entry into the Hero I-League 2, bringing the total number of clubs to 20.

These 20 teams are divided into the four groups of five and play each other in a round-robin home and away format. The group winners, along with the best second-placed team, play in the final round, a single-leg round robin format competition.^[12]

All-time clubs

As of 2024^[update]

Clubs promoted/relegated to I-League 2

Clubs promoted/relegated from I-League 2

Performance by clubs

Sponsorship

From 2008 to 2011 the league was sponsored by Oil and Natural Gas Corporation (ONGC) and was named the ONGC I-League 2nd Division. ONGC was also the title sponsor of the I-League. In October 2011 ONGC was dropped as a sponsor.

Broadcasters

Prize money

As updated on 19 May 2023:^{[citation needed]}