1920s
- Akron Pros / Indians* (1920-26)
- Brooklyn Lions (1926)
- Buffalo All Americans / Bisons / Rangers (1920-27, 1929)
- It can be argued the All-Americans have claims to the championships of 1920 and 1921.
- Canton Bulldogs* (1920-23, 1925-26)
- Chicago Tigers (1920)
- Cincinnati Celts (1921)
- Cleveland Indians/Bulldogs* (1923-25, 1927)
- Columbus Panhandles/Tigers (1920-26)
- Dayton Triangles (1920-29)
- It can be argued that the Triangles still exist today as the Indianapolis Colts; see the team article for details.
- Detroit Heralds (1920)
- Detroit Tigers (1921)
- Detroit Panthers (1925-26)
- Detroit Wolverines (1928)
- Duluth Kelleys/Eskimos (1923-27)
- It can be argued that the Kelleys/Eskimos still exist today as the Washington Redskins; see the team article for details.
- Evansville Crimson Giants (1921-22)
- Frankford Yellow Jackets* (1924-31)
- Hammond Pros (1920-26)
- Hartford Blues (1926)
- Kansas City Blues/Cowboys (1924-26)
- Kenosha Maroons (1924)
- Los Angeles Buccaneers (1926)
- Louisville Breckenridges (a.k.a. "Brecks") (1921-23)
- Louisville Colonels (1926)
- Massillon Tigers (Attended the August 1920 meeting but never fielded a team in the APFA/NFL)
- Milwaukee Badgers (1922-26)
- Minneapolis Marines (1921-24)
- Minneapolis Red Jackets (1929-30)
- Muncie Flyers (1920-21)
- New York Brickley Giants (1921)
- New York Yankees (1926 1st AFL)(1927-28 NFL)
- Newark Tornadoes (1930)
- Oorang Indians (1922-23)
- Orange Tornadoes (1929)
- Pottsville Maroons/Boston Bulldogs (1925-29)
- Providence Steam Roller* (1925-31)
- Racine Legion (1922-24)
- Racine Tornadoes (1926)
- Rochester Jeffersons (1920-25)
- Rock Island Independents (1920-25)
- Staten Island Stapletons (1929-32)
- St. Louis All Stars (1923)
- Syracuse Pros (1921; it is disputed whether or not this team actually joined the league)
- Toledo Maroons (1922-23)
- Tonawanda Kardex (1921)
- Washington Senators (1921)
- Youngstown Patricians (1922; joined league and had schedule planned but never played)
Read more about this topic: List Of Defunct National Football League Franchises