Football in India
National Football League, established in 1996 by governing body All India Football Federation (AIFF) was the first "semi-professional" football league in India. 
The League was renamed and restructured and the I-League was founded in 2006 after India's former top league the National Football League disbanded in a successful effort aimed at increasing the game in India. Links with clubs that were not in the I-League were maintained, and each season the bottom two clubs are relegated from the I-League and replaced by two from the I-League 2nd Division. The I-League is currently contested between 11 clubs. The Kolkata Derby in the I League (and other tournaments) played between Mohun Bagan and East Bengal is one of the most fierce rivalries in the world (featured in FIFA website) and one of the oldest derbies in the world (90 years). An average 80, 000 to 100, 000 supporters throng the stadium in this special fixture.
Indian Women's League
Since 1991, the top women's football tournament in India has been the Indian Women's Football Championship. The tournament served as a female equivalent of the Santosh Trophy, with states competing against each other. There had never been an organized national football league for women; however, leagues were started by state associations for women. The first women's state football league was set up in 1976 in Manipur. The Indian Football Association of West Bengal founded the Calcutta Women's League in 1993. Leagues were also started in Mumbai and Goa in 1998 and 1999 respectively.