List of NFL teams per season

1920 season (as American Professional Football Association)

 * Akron Pros (8-3-0)
 * Buffalo All-Americans (9-1-1)
 * Canton Bulldogs (7-4-2)
 * Chicago Cardinals (6-2-2)
 * Chicago Tigers (2-5-1)
 * Cleveland Tigers (2-4-2)
 * Columbus Panhandles (2-6-2)
 * Dayton Triangles (5-2-2)
 * Decatur Staleys (10-1-2)
 * Detroit Heralds (2-3-3)
 * Hammond Pros (2-5-0)
 * Muncie Flyers (0-1-0)
 * Rochester Jeffersons (6-3-2)
 * Rock Island Independents (6-2-2)

1921 season (as APFA)

 * Akron Pros (8-3-1)
 * Buffalo All-Americans (9-1-2)
 * Canton Bulldogs (5-2-3)
 * Chicago Cardinals (3-3-2)
 * Chicago Staleys (9-1-1) (moved from Decatur)
 * Cincinnati Celts (1-3-0)
 * Cleveland Indians (3-5-0) (formerly Tigers)
 * Columbus Pandhandles (1-8-0)
 * Dayton Triangles (4-4-1)
 * Detroit Tigers (1-5-1) (formerly Heralds)
 * Evansville Crimson Giants (3-2-0)
 * Green Bay Packers (3-2-1)
 * Hammond Pros (1-3-1)
 * Louisville Brecks (0-2-0)
 * Minneapolis Marines (1-3-0)
 * Muncie Flyers (0-2-0)
 * New York Brickley Giants (0-2-0)
 * Rochester Jeffersons (2-3-0)
 * Rock Island Independents (4-2-1)
 * Tonawanda Kardex (0-1-0)
 * Washington Senators (1-2-0)

1922 season (first season as National Football League)

 * Akron Pros (3-5-2)
 * Buffalo All-Americans (5-4-1)
 * Canton Bulldogs (10-0-2)
 * Chicago Bears (9-3-0) (formerly Staleys)
 * Chicago Cardinals (8-3-0)
 * Columbus Pandhandles (0-8-0)
 * Dayton Triangles (4-3-1)
 * Evansville Crimson Giants (0-3-0)
 * Green Bay Packers (4-3-3)
 * Hammond Pros (0-5-1)
 * Louisville Brecks (1-3-0)
 * Milwaukee Badgers (2-4-3)
 * Minneapolis Marines (1-3-0)
 * Oorang Indians (3-6-0)
 * Racine Legion (6-4-1)
 * Rochester Jeffersons (0-4-1)
 * Rock Island Independents (4-2-1)
 * Toledo Maroons (5-2-2)

1923 season

 * Akron Indians (1-6-0) (formerly Pros)
 * Buffalo All-Americans (5-4-3)
 * Canton Bulldogs (11-0-1)
 * Chicago Bears (9-2-1)
 * Chicago Cardinals (8-4-0)
 * Cleveland Indians (3-1-3)
 * Columbus Tigers (5-4-1) (formerly Panhandles)
 * Dayton Triangles (1-6-1)
 * Duluth Kelleys (4-3-0)
 * Green Bay Packers (7-2-1)
 * Hammond Pros (1-5-1)
 * Louisville Brecks (0-3-0)
 * Milwaukee Badgers (7-2-3)
 * Minneapolis Marines (2-5-2)
 * Oorang Indians (1-10-0)
 * Racine Legion (4-4-2)
 * Rochester Jeffersons (0-4-0)
 * Rock Island Independents (2-3-3)
 * St. Louis All Stars (1-4-2)
 * Toledo Maroons (3-3-2)

1924 season

 * Akron Indians (2-6-0)
 * Buffalo Bisons (6-5-0) (formerly All-Americans)
 * Chicago Bears (6-1-4)
 * Chicago Cardinals (5-4-1)
 * Cleveland Bulldogs (7-1-1)
 * Columbus Tigers (4-4-0)
 * Dayton Triangles (2-6-0)
 * Duluth Kelleys (5-1-0)
 * Frankford Yellow Jackets (11-2-1)
 * Green Bay Packers (7-4-0)
 * Hammond Pros (2-2-1)
 * Kansas City Blues (2-7-0)
 * Kenosha Maroons (0-4-1)
 * Milwaukee Badgers (5-8-0)
 * Minneapolis Marines (0-6-0)
 * Racine Legion (4-3-3)
 * Rochester Jeffersons (0-7-0)
 * Rock Island Independents (5-2-2)

1925 season

 * Akron Pros
 * Buffalo Bisons
 * Chicago Bears
 * Chicago Cardinals
 * Canton Bulldogs
 * Cleveland Bulldogs
 * Columbus Tigers
 * Dayton Triangles
 * Detroit Panthers (formerly Tigers)
 * Duluth Kelleys
 * Frankford Yellow Jackets
 * Green Bay Packers
 * Hammond Pros
 * Kansas City Cowboys (formerly Blues)
 * Milwaukee Badgers
 * Minneapolis Marines
 * New York Giants
 * Pottsville Maroons
 * Providence Steam Roller
 * Racine Legion
 * Rochester Jeffersons
 * Rock Island Independents

1926 season

 * Akron Indians (formerly Pros)
 * Brooklyn Lions
 * Buffalo Rangers (formerly Bisons)
 * Chicago Bears
 * Chicago Cardinals
 * Canton Bulldogs
 * Cleveland Bulldogs
 * Columbus Tigers
 * Dayton Triangles
 * Detroit Panthers
 * Duluth Eskimos (formerly Kelleys)
 * Frankford Yellow Jackets
 * Green Bay Packers
 * Hammond Pros
 * Hartford Blues
 * Kansas City Cowboys
 * Los Angeles Buccaneers
 * Louisville Colonels
 * Milwaukee Badgers
 * New York Giants
 * Pottsville Maroons
 * Providence Steam Roller
 * Racine Tornadoes (formerly Legion)

1927 season

 * Buffalo Bisons (formerly Rangers)
 * Chicago Bears
 * Chicago Cardinals
 * Cleveland Bulldogs
 * Dayton Triangles
 * Duluth Eskimos
 * Frankford Yellow Jackets
 * Green Bay Packers
 * New York Giants
 * New York Yankees
 * Pottsville Maroons
 * Providence Steam Roller

1928 season

 * Chicago Bears
 * Chicago Cardinals
 * Dayton Triangles
 * Detroit Wolverines
 * Frankford Yellow Jackets
 * Green Bay Packers
 * New York Giants
 * New York Yankees
 * Pottsville Maroons
 * Providence Steam Roller

1929 season

 * Boston Bulldogs (formerly Pottsville Maroons)
 * Chicago Bears
 * Chicago Cardinals
 * Dayton Triangles
 * Detroit Wolverines
 * Frankford Yellow Jackets
 * Green Bay Packers
 * Minneapolis Red Jackets (formerly Marines)
 * New York Giants
 * New York Yankees
 * Orange Tornadoes
 * Providence Steam Roller
 * Staten Island Stapletons

1930 season

 * Brooklyn Dodgers
 * Chicago Bears
 * Chicago Cardinals
 * Frankford Yellow Jackets
 * Green Bay Packers
 * Minneapolis Red Jackets
 * Newark Tornadoes (formerly Orange Tornadoes)
 * New York Giants
 * Portsmouth Spartans
 * Providence Steam Roller
 * Staten Island Stapletons

1931 season

 * Brooklyn Dodgers
 * Chicago Bears
 * Chicago Cardinals
 * Cleveland Indians
 * Frankford Yellow Jackets
 * Green Bay Packers
 * New York Giants
 * Portsmouth Spartans
 * Providence Steam Roller
 * Staten Island Stapletons

1932 season

 * Boston Braves
 * Brooklyn Dodgers
 * Chicago Bears
 * Chicago Cardinals
 * Green Bay Packers
 * New York Giants
 * Portsmouth Spartans
 * Staten Island Stapletons

1933 season

 * Boston Redskins (formerly Braves)
 * Brooklyn Dodgers
 * Chicago Bears
 * Chicago Cardinals
 * Cincinnati Reds
 * Green Bay Packers
 * New York Giants
 * Philadelphia Eagles
 * Pittsburgh Pirates
 * Portsmouth Spartans

1934 season

 * Boston Redskins
 * Brooklyn Dodgers
 * Chicago Bears
 * Chicago Cardinals
 * Cincinnati Reds
 * Detroit Lions (formerly Portsmouth Spartans)
 * Green Bay Packers
 * New York Giants
 * Philadelphia Eagles
 * Pittsburgh Pirates
 * St. Louis Gunners

1935–36 seasons

 * Boston Redskins
 * Brooklyn Dodgers
 * Chicago Bears
 * Chicago Cardinals
 * Detroit Lions
 * Green Bay Packers
 * New York Giants
 * Philadelphia Eagles
 * Pittsburgh Pirates

1937-39 seasons

 * Brooklyn Dodgers
 * Chicago Bears
 * Chicago Cardinals
 * Cleveland Rams
 * Detroit Lions
 * Green Bay Packers
 * New York Giants
 * Philadelphia Eagles
 * Pittsburgh Pirates
 * Washington Redskins (moved from Boston)

1940–42 seasons

 * Brooklyn Dodgers
 * Chicago Bears
 * Chicago Cardinals
 * Cleveland Rams
 * Detroit Lions
 * Green Bay Packers
 * New York Giants
 * Philadelphia Eagles
 * Pittsburgh Steelers (formerly Pirates)
 * Washington Redskins

1943 season

 * Brooklyn Dodgers
 * Chicago Bears
 * Chicago Cardinals
 * Detroit Lions
 * Green Bay Packers
 * New York Giants
 * Philadelphia Eagles - Pittsburgh Steelers "Phil-Pitt"
 * Washington Redskins

1944 season

 * Boston Yanks
 * Brooklyn Tigers (formerly Dodgers)
 * Chicago Bears
 * Cleveland Rams
 * Detroit Lions
 * Green Bay Packers
 * New York Giants
 * Philadelphia Eagles
 * Pittsburgh Steelers - Chicago Cardinals "Card-Pitt"
 * Washington Redskins

1945 season

 * Boston Yanks
 * Chicago Bears
 * Chicago Cardinals
 * Cleveland Rams
 * Detroit Lions
 * Green Bay Packers
 * New York Giants
 * Philadelphia Eagles
 * Pittsburgh Steelers
 * Washington Redskins

1946–48 seasons

 * Boston Yanks
 * Chicago Bears
 * Chicago Cardinals
 * Detroit Lions
 * Green Bay Packers
 * Los Angeles Rams (moved from Cleveland)
 * New York Giants
 * Philadelphia Eagles
 * Pittsburgh Steelers
 * Washington Redskins

1949 season

 * Chicago Bears
 * Chicago Cardinals
 * Detroit Lions
 * Green Bay Packers
 * Los Angeles Rams
 * New York Bulldogs
 * New York Giants
 * Philadelphia Eagles
 * Pittsburgh Steelers
 * Washington Redskins

1950 season

 * Baltimore Colts (All America Football Conference merger)
 * Chicago Bears
 * Chicago Cardinals
 * Cleveland Browns (AAFC merger)
 * Detroit Lions
 * Green Bay Packers
 * Los Angeles Rams
 * New York Giants
 * New York Yanks (formerly Bulldogs)
 * Philadelphia Eagles
 * Pittsburgh Steelers
 * San Francisco 49ers (AAFC merger)
 * Washington Redskins

1951 season

 * Chicago Bears
 * Chicago Cardinals
 * Cleveland Browns
 * Detroit Lions
 * Green Bay Packers
 * Los Angeles Rams
 * New York Giants
 * New York Yanks
 * Philadelphia Eagles
 * Pittsburgh Steelers
 * San Francisco 49ers
 * Washington Redskins

1952 season

 * Chicago Bears
 * Chicago Cardinals
 * Cleveland Browns
 * Dallas Texans
 * Detroit Lions
 * Green Bay Packers
 * Los Angeles Rams
 * New York Giants
 * Philadelphia Eagles
 * Pittsburgh Steelers
 * San Francisco 49ers
 * Washington Redskins

1953-59 seasons

 * Baltimore Colts
 * Chicago Bears
 * Chicago Cardinals
 * Cleveland Browns
 * Detroit Lions
 * Green Bay Packers
 * Los Angeles Rams
 * New York Giants
 * Philadelphia Eagles
 * Pittsburgh Steelers
 * San Francisco 49ers
 * Washington Redskins

1960 season

 * Baltimore Colts
 * Chicago Bears
 * Cleveland Browns
 * Dallas Cowboys (expansion)
 * Detroit Lions
 * Green Bay Packers
 * Los Angeles Rams
 * New York Giants
 * Philadelphia Eagles
 * Pittsburgh Steelers
 * San Francisco 49ers
 * St. Louis Cardinals (moved from Chicago)
 * Washington Redskins

1961-65 seasons

 * Baltimore Colts
 * Chicago Bears
 * Cleveland Browns
 * Dallas Cowboys
 * Detroit Lions
 * Green Bay Packers
 * Los Angeles Rams
 * Minnesota Vikings (expansion)
 * New York Giants
 * Philadelphia Eagles
 * Pittsburgh Steelers
 * San Francisco 49ers
 * St. Louis Cardinals
 * Washington Redskins

1966 season

 * Atlanta Falcons (expansion)
 * Baltimore Colts
 * Chicago Bears
 * Cleveland Browns
 * Dallas Cowboys
 * Detroit Lions
 * Green Bay Packers
 * Los Angeles Rams
 * Minnesota Vikings
 * New York Giants
 * Philadelphia Eagles
 * Pittsburgh Steelers
 * San Francisco 49ers
 * St Louis Cardinals
 * Washington Redskins

1967-69 seasons

 * Atlanta Falcons
 * Baltimore Colts
 * Chicago Bears
 * Cleveland Browns
 * Dallas Cowboys
 * Detroit Lions
 * Green Bay Packers
 * Los Angeles Rams
 * Minnesota Vikings
 * New Orleans Saints (expansion)
 * New York Giants
 * Philadelphia Eagles
 * Pittsburgh Steelers
 * San Francisco 49ers
 * St Louis Cardinals
 * Washington Redskins

1970 season

 * Atlanta Falcons
 * Baltimore Colts
 * Boston Patriots (American Football League merger)
 * Buffalo Bills (AFL)
 * Chicago Bears
 * Cincinnati Bengals (AFL)
 * Cleveland Browns
 * Dallas Cowboys
 * Denver Broncos (AFL)
 * Detroit Lions
 * Green Bay Packers
 * Houston Oilers (AFL)
 * Kansas City Chiefs (AFL)
 * Los Angeles Rams
 * Miami Dolphins (AFL)
 * Minnesota Vikings
 * New Orleans Saints
 * New York Giants
 * New York Jets (AFL)
 * Oakland Raiders (AFL)
 * Philadelphia Eagles
 * Pittsburgh Steelers
 * San Diego Chargers (AFL)
 * San Francisco 49ers
 * St Louis Cardinals
 * Washington Redskins

1971-75 seasons

 * Atlanta Falcons
 * Baltimore Colts
 * Buffalo Bills
 * Chicago Bears
 * Cincinnati Bengals
 * Cleveland Browns
 * Dallas Cowboys
 * Denver Broncos
 * Detroit Lions
 * Green Bay Packers
 * Houston Oilers
 * Kansas City Chiefs
 * Los Angeles Rams
 * Miami Dolphins
 * Minnesota Vikings
 * New England Patriots (formerly Boston Patriots)
 * New Orleans Saints
 * New York Giants
 * New York Jets
 * Oakland Raiders
 * Philadelphia Eagles
 * Pittsburgh Steelers
 * San Diego Chargers
 * San Francisco 49ers
 * St Louis Cardinals
 * Washington Redskins

1976-81 seasons

 * Atlanta Falcons
 * Baltimore Colts
 * Buffalo Bills
 * Chicago Bears
 * Cincinnati Bengals
 * Cleveland Browns
 * Dallas Cowboys
 * Denver Broncos
 * Detroit Lions
 * Green Bay Packers
 * Houston Oilers
 * Kansas City Chiefs
 * Los Angeles Rams
 * Miami Dolphins
 * Minnesota Vikings
 * New England Patriots
 * New Orleans Saints
 * New York Giants
 * New York Jets
 * Oakland Raiders
 * Philadelphia Eagles
 * Pittsburgh Steelers
 * San Diego Chargers
 * San Francisco 49ers
 * Seattle Seahawks (expansion)
 * St Louis Cardinals
 * Tampa Bay Buccaneers (expansion)
 * Washington Redskins

1982-83 seasons

 * Atlanta Falcons
 * Baltimore Colts
 * Buffalo Bills
 * Chicago Bears
 * Cincinnati Bengals
 * Cleveland Browns
 * Dallas Cowboys
 * Denver Broncos
 * Detroit Lions
 * Green Bay Packers
 * Houston Oilers
 * Kansas City Chiefs
 * Los Angeles Raiders (moved from Oakland)
 * Los Angeles Rams
 * Miami Dolphins
 * Minnesota Vikings
 * New England Patriots
 * New Orleans Saints
 * New York Giants
 * New York Jets
 * Philadelphia Eagles
 * Pittsburgh Steelers
 * San Diego Chargers
 * San Francisco 49ers
 * Seattle Seahawks
 * St Louis Cardinals
 * Tampa Bay Buccaneers
 * Washington Redskins

1984-87 seasons

 * Atlanta Falcons
 * Buffalo Bills
 * Chicago Bears
 * Cincinnati Bengals
 * Cleveland Browns
 * Dallas Cowboys
 * Denver Broncos
 * Detroit Lions
 * Green Bay Packers
 * Houston Oilers
 * Indianapolis Colts (moved from Baltimore)
 * Kansas City Chiefs
 * Los Angeles Raiders
 * Los Angeles Rams
 * Miami Dolphins
 * Minnesota Vikings
 * New England Patriots
 * New Orleans Saints
 * New York Giants
 * New York Jets
 * Philadelphia Eagles
 * Pittsburgh Steelers
 * San Diego Chargers
 * San Francisco 49ers
 * Seattle Seahawks
 * St Louis Cardinals
 * Tampa Bay Buccaneers
 * Washington Redskins

1988-93 seasons

 * Atlanta Falcons
 * Buffalo Bills
 * Chicago Bears
 * Cincinnati Bengals
 * Cleveland Browns
 * Dallas Cowboys
 * Denver Broncos
 * Detroit Lions
 * Green Bay Packers
 * Houston Oilers
 * Indianapolis Colts
 * Kansas City Chiefs
 * Los Angeles Raiders
 * Los Angeles Rams
 * Miami Dolphins
 * Minnesota Vikings
 * New England Patriots
 * New Orleans Saints
 * New York Giants
 * New York Jets
 * Philadelphia Eagles
 * Phoenix Cardinals (moved from St Louis)
 * Pittsburgh Steelers
 * San Diego Chargers
 * San Francisco 49ers
 * Seattle Seahawks
 * Tampa Bay Buccaneers
 * Washington Redskins

1994 season

 * Arizona Cardinals (formerly Phoenix Cardinals)
 * Atlanta Falcons
 * Buffalo Bills
 * Chicago Bears
 * Cincinnati Bengals
 * Cleveland Browns
 * Dallas Cowboys
 * Denver Broncos
 * Detroit Lions
 * Green Bay Packers
 * Houston Oilers
 * Indianapolis Colts
 * Kansas City Chiefs
 * Los Angeles Raiders
 * Los Angeles Rams
 * Miami Dolphins
 * Minnesota Vikings
 * New England Patriots
 * New Orleans Saints
 * New York Giants
 * New York Jets
 * Philadelphia Eagles
 * Pittsburgh Steelers
 * San Diego Chargers
 * San Francisco 49ers
 * Seattle Seahawks
 * Tampa Bay Buccaneers
 * Washington Redskins

1995 season

 * Arizona Cardinals
 * Atlanta Falcons
 * Buffalo Bills
 * Carolina Panthers (expansion)
 * Chicago Bears
 * Cincinnati Bengals
 * Cleveland Browns
 * Dallas Cowboys
 * Denver Broncos
 * Detroit Lions
 * Green Bay Packers
 * Houston Oilers
 * Indianapolis Colts
 * Jacksonville Jaguars (expansion)
 * Kansas City Chiefs
 * Los Angeles Raiders
 * Los Angeles Rams
 * Miami Dolphins
 * Minnesota Vikings
 * New England Patriots
 * New Orleans Saints
 * New York Giants
 * New York Jets
 * Oakland Raiders (moved from Los Angeles)
 * Philadelphia Eagles
 * Pittsburgh Steelers
 * San Diego Chargers
 * San Francisco 49ers
 * Seattle Seahawks
 * St Louis Rams (moved from Los Angeles)
 * Tampa Bay Buccaneers
 * Washington Redskins

1996 season

 * Arizona Cardinals
 * Atlanta Falcons
 * Baltimore Ravens (New franchise created from the Cleveland Browns)
 * Buffalo Bills
 * Carolina Panthers
 * Chicago Bears
 * Cincinnati Bengals
 * Dallas Cowboys
 * Denver Broncos
 * Detroit Lions
 * Green Bay Packers
 * Houston Oilers
 * Indianapolis Colts
 * Jacksonville Jaguars
 * Kansas City Chiefs
 * Los Angeles Raiders
 * Los Angeles Rams
 * Miami Dolphins
 * Minnesota Vikings
 * New England Patriots
 * New Orleans Saints
 * New York Giants
 * New York Jets
 * Oakland Raiders
 * Philadelphia Eagles
 * Pittsburgh Steelers
 * San Diego Chargers
 * San Francisco 49ers
 * Seattle Seahawks
 * St Louis Rams
 * Tampa Bay Buccaneers
 * Washington Redskins

1997-98 seasons

 * Arizona Cardinals
 * Atlanta Falcons
 * Baltimore Ravens
 * Buffalo Bills
 * Carolina Panthers
 * Chicago Bears
 * Cincinnati Bengals
 * Dallas Cowboys
 * Denver Broncos
 * Detroit Lions
 * Green Bay Packers
 * Indianapolis Colts
 * Jacksonville Jaguars
 * Kansas City Chiefs
 * Miami Dolphins
 * Minnesota Vikings
 * New England Patriots
 * New Orleans Saints
 * New York Giants
 * New York Jets
 * Oakland Raiders
 * Philadelphia Eagles
 * Pittsburgh Steelers
 * San Diego Chargers
 * San Francisco 49ers
 * Seattle Seahawks
 * St Louis Rams
 * Tampa Bay Buccaneers
 * Tennessee Oilers (moved from Houston)
 * Washington Redskins

1999-2001 seasons

 * Arizona Cardinals
 * Atlanta Falcons
 * Baltimore Ravens
 * Buffalo Bills
 * Carolina Panthers
 * Chicago Bears
 * Cincinnati Bengals
 * Cleveland Browns (expansion)
 * Dallas Cowboys
 * Denver Broncos
 * Detroit Lions
 * Green Bay Packers
 * Indianapolis Colts
 * Jacksonville Jaguars
 * Kansas City Chiefs
 * Miami Dolphins
 * Minnesota Vikings
 * New England Patriots
 * New Orleans Saints
 * New York Giants
 * New York Jets
 * Oakland Raiders
 * Philadelphia Eagles
 * Pittsburgh Steelers
 * San Diego Chargers
 * San Francisco 49ers
 * Seattle Seahawks
 * St Louis Rams
 * Tampa Bay Buccaneers
 * Tennessee Titans (formerly Oilers)
 * Washington Redskins

2002 season to present

 * Arizona Cardinals
 * Atlanta Falcons
 * Baltimore Ravens
 * Buffalo Bills
 * Carolina Panthers
 * Chicago Bears
 * Cincinnati Bengals
 * Cleveland Browns
 * Dallas Cowboys
 * Denver Broncos
 * Detroit Lions
 * Green Bay Packers
 * Houston Texans (expansion)
 * Indianapolis Colts
 * Jacksonville Jaguars
 * Kansas City Chiefs
 * Miami Dolphins
 * Minnesota Vikings
 * New England Patriots
 * New Orleans Saints
 * New York Giants
 * New York Jets
 * Oakland Raiders
 * Philadelphia Eagles
 * Pittsburgh Steelers
 * San Diego Chargers
 * San Francisco 49ers
 * Seattle Seahawks
 * St Louis Rams
 * Tampa Bay Buccaneers
 * Tennessee Titans
 * Washington Redskins