Category:Defunct American football leagues in the United States

• Defunct indoor American football leagues in the United States (17 C, 22 P)

A

• All-America Football Conference (6 C, 7 P)
• Alliance of American Football (6 C, 3 P)
• American Football Association (1977–1983) (4 P)
• American Football League (14 C, 14 P)
• Anthracite League (2 C, 2 P)
• Atlantic Coast Football League (3 C, 1 P)

C

• Continental Football League (4 C, 2 P)

F

• Fall Experimental Football League (4 C, 2 P)

N

• National Football League (1902) (3 C, 2 P)
• New York Pro Football League (2 C, 1 P)

O

• Ohio League (3 C, 3 P)

R

• Regional Football League (2 C, 1 P)

U

• United Football League (1961–1964) (3 C, 2 P)
• United Football League (2009–2012) (11 C, 1 P)
• United National Gridiron League (2 P)
• United States Football League (10 C, 2 P)

W

• World Football League (4 C, 10 P)
• World Football League (2008–2010) (3 P)
• World Series of Football (1902–03) (3 C, 9 P)

X

• XFL (2001) (5 C, 5 P)

A

• A-11 Football League
• American Association (American football)
• American Football Association (1977–1983)
• American Football Conference (1959–1961)
• American Football League (1934)
• American Football League (1944)
• American Football Union
• American Football Women's League
• Anthracite League
• Association of Professional Football Leagues
• Atlantic Coast Football League

C

• Continental Football League

D

• Dixie League (American football)

E

• Eastern League of Professional Football
• Eastern Pennsylvania Football League

F

• Fall Experimental Football League

M

• Midwest Football League (1935–1940)
• Midwest Football League (1962–1978)
• Minor league football (gridiron)

N

• National Football League (1902)
• New York Pro Football League
• North Pacific Football League
• Northwest Football League

P

• Pacific Coast Professional Football League
• Professional Football League of America
• Professional Spring Football League

R

• Regional Football League

S

• Seaboard Football League
• Spring Football League
• Stars Football League

T

• Texas Football League

U

• United American Football League
• United Football League (1961–1964)
• United Football League (2009–2012)
• United National Gridiron League
• United States Football League
• United States Football League (2022–2023)

V

• Virginia-Carolina Football League

W

• Western Pennsylvania Professional Football Circuit
• Wilmington Football League
• Women's American Football League
• Women's Football Association (2002–03)
• World Football League
• World Football League (2008–2010)
• World Series of Football (1902–03)

X

• XFL (2001)
• XFL (2020–2023)