01. American Football
Without any doubt, American Football is on the top in the list of the most popular sport in America. In world ranking of the most popular sports, American Football is on ninth number. National Football League (NFL) organizes the different tournaments of American Football. It is the most watched sport in the South America, more specially in the States of Texas, Florida and California. With a ratio of approximately 68,000 spectator per match, in 2012 league, American Football became the most famous sport in America. It is placed on first number in the list of the Most Popular American Sports.