Eight-man football is a form of gridiron football, generally played by high schools with smaller enrollments. Eight-man football differs from the traditional 11-man game with the reduction of three players on each side of the ball and a field width that can be reduced to 40 yards, 13 1/3 yards narrower than the 53 1/3-yard 11-man field. Most states continue to play on a field 100 yards long, whereas a few states opt for 80-yard lengths. Reduced-player football, which consists of eight-man, six-man, and nine-man football has gained popularity across the United States. As of 2015, 1,561 schools in 30 states sponsor reduced-player football, with 1,161 of those teams participating in eight-man leagues, whereas 284 teams play six-man football and 116 teams play nine-man football.

Gridiron football, also known as North American football, or in North America as simply football, is a family of football team sports primarily played in the United States and Canada. American football, which uses 11 players, is the form played in the United States and the best known form of gridiron football worldwide, while Canadian football, which uses 12 players, predominates in Canada. Other derivative varieties include arena football, flag football and amateur games such as touch and street football. Football is played at professional, collegiate, high school, semi-professional, and amateur levels.