American football in the United States

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American football in the United States
The US Navy Midshipmen (at left, in blue) line up on offense against the Army's Black Knights
Country	United States
Governing body	USA Football
National team(s)	United States
First played	1869, New Brunswick, New Jersey
Registered players	5 million+[1]
Club competitions
List Men's: National Football League (Major league) United Football League (High-level minor league) Gridiron Developmental Football League (Low-level minor league) Rivals Professional Football League (Low-level minor league) Women's: Women's Football Alliance(Major league)
International competitions
IFAF World Championship

American football is a form of gridiron football and the most popular sport in the United States. In the United States, the game is most often referred to as simply "football". Football is played in leagues of different size, age and quality, in all regions of the country.

There is no single national governing body for American football in the United States or a continental governing body for North America. There is an international governing body, the International Federation of American Football, or IFAF. The National Football League has the highest revenue and average attendance of any sports league in the world.