This document analyzes the social media popularity and fan bases of various Indian football clubs that participate in the I-League and Indian Super League (ISL). It finds that Atletico de Kolkata has the highest Simplify360 Social Index and is the most popular club on social media. Overall, ISL clubs have more total social media fans than I-League clubs, though East Bengal, an I-League club, has the largest individual fan base with over 1.3 million Facebook fans. The document also provides statistics on football fandom in various Indian cities and states.