4) FC Pune City (1.07m followers)
FC Pune City's fan following around social media is quite large. They may not have made it to the semifinals in any season yet, but they have still managed to cross the 1 million-mark. Pune are the 3rd most followed club on Facebook.

Facebook - 889149 likes
Twitter - 123k followers
Instagram - 57.8k followers
3) Chennaiyin FC (1.08m followers)
The second edition champions Chennaiyin FC became the fourth team to enter the 1 million followers' club in ISL.They have a strong surprisingly higher Twitter-following than Facebook. They acquired more fans after becoming champions in the second season and also another advantage is of co-owners Bollywood star Abhishek Bachan and cricket star MS Dhoni (who was captain of Chennai super king in IPL) have most followers in social media.

Facebook - 440557 likes
Twitter - 552k followers
Instagram - 94.4k followers