The regular season began on 20 October 2019 and concluded on 14 March 2020.
Hyderabad replaced the disbanded Pune City,[1] whereas Delhi Dynamos moved to Bhubaneswar and rebranded as Odisha.
[2] Bengaluru were the defending champions, having won their maiden Indian Super League title by defeating Goa 1–0 in the 2018–19 final.
[5] On 14 March 2020, ATK beat Chennaiyin 3–1 in the final, becoming the first club to win three ISL titles.
The number of foreign players allowed in the squad is maximum seven and a minimum of six.