NFL Champions 1920-2018

From 1920-1931, the NFL champion was determined by a team's win-loss percentage. In 1932, a playoff game was needed to determine the championship. Starting in 1933, the NFL split into two divisions and a championship game was played between the two division winners. The AFL and NFL announced that the two leagues would merge in 1970. The Super Bowl started to determine the world champions. The game featured the champion of each league. Beginning in 1970, the AFL and NFL played as one league with two conferences, the American Football Conference and the National Football Conference. The two conference champions meet in the Super Bowl to determine the champion.

2018 (Super Bowl LIII) - New England Patriots 

2017 (Super Bowl LII) - Philadelphia Eagles

2016 (Super Bowl LI) - New England Patriots

2015 (Super Bowl 50) - Denver Broncos
2014 (Super Bowl XLIX) - New England Patriots
2013 (Super Bowl XLVIII) - Seattle Seahawks
2012 (Super Bowl XLVII) - Baltimore Ravens
2011 (Super Bowl XLVI) - New York Giants
2010 (Super Bowl XLV) - Green Bay Packers
2009 (Super Bowl XLIV) - New Orleans Saints
2008 (Super Bowl XLVIII) - Pittsburgh Steelers
2007 (Super Bowl XLVII) - New York Giants
2006 (Super Bowl XLVI) - Indianapolis Colts
2005 (Super Bowl XLV) - Pittsburgh Steelers
2004 (Super Bowl XXXIX) - New England Patriots
2003 (Super Bowl XXXVIII) - New England Patriots
2002 (Super Bowl XXXVII) - Tampa Bay Buccaneers
2001 (Super Bowl XXXVI) - New England Patriots
2000 (Super Bowl XXXV) - Baltimore Ravens
1999 (Super Bowl XXXIV) - St. Louis Rams
1998 (Super Bowl XXIII) - Denver Broncos
1997 (Super Bowl XXXII) - Denver Broncos
1996 (Super Bowl XXXI) - Green Bay Packers
1995 (Super Bowl XXX) - Dallas Cowboys
1994 (Super Bowl XXIX) - San Francisco 49ers
1993 (Super Bowl XXVIII) - Dallas Cowboys
1992 (Super Bowl XXVII) - Dallas Cowboys
1991 (Super Bowl XXVI) - Washington Redskins
1990 (Super Bowl XXV) - New York Giants
1989 (Super Bowl XXIV) - San Francisco 49ers
1988 (Super Bowl XXIII) - San Francisco 49ers
1987 (Super Bowl XXII) - Washington Redskins
1986 (Super Bowl XXI) - New York Giants
1985 (Super Bowl XX) - Chicago Bears
1984 (Super Bowl XIX) - San Francisco 49ers
1983 (Super Bowl XVIII) - Los Angeles Raiders
1982 (Super Bowl XVII) - Washington Redskins
1981 (Super Bowl XVI) - San Francisco 49ers
1980 (Super Bowl XV) - Oakland Raiders
1979 (Super Bowl XIV) - Pittsburgh Steelers
1978 (Super Bowl XIII) - Pittsburgh Steelers
1977 (Super Bowl XII) - Dallas Cowboys
1976 (Super Bowl XI) - Oakland Raiders
1975 (Super Bowl X) - Pittsburgh Steelers
1974 (Super Bowl IX) - Pittsburgh Steelers
1973 (Super Bowl VIII) - Miami Dolphins 
1972 (Super Bowl VII) - Miami Dolphins
1971 (Super Bowl VI) - Dallas Cowboys
1970 (Super Bowl V) - Baltimore Colts
1969 (Super Bowl IV) - Kansas City Chiefs; (NFL: Minnesota Vikings)
1968 (Super Bowl III) - New York Jets; (NFL: Baltimore Colts)
1967 (Super Bowl II) - Green Bay Packers; (AFL: Oakland Raiders) 
1966 (Super Bowl I) - Green Bay Packers; (AFL: Kansas City Chiefs)

1965 - AFL: Buffalo Bills; NFL: Green Bay Packers
1964 - AFL: Buffalo Bills; NFL: Cleveland Browns (NFL)
1963 - AFL: San Diego Chargers; NFL: Chicago Bears (NFL)
1962 - AFL: Dallas Texans; NFL: Green Bay Packers (NFL)
1961 - AFL: Houston Oilers; NFL: Green Bay Packers (NFL)
1960 - AFL: Houston Oilers; NFL: Philadelphia Eagles (NFL)
1959 - Baltimore Colts
1958 - Baltimore Colts
1957 - Detroit Lions
1956 - New York Giants
1955 - Cleveland Browns
1954 - Cleveland Browns
1953 - Detroit Lions
1952 - Detroit Lions
1951 - Los Angeles Rams
1950 - Cleveland Browns
1949 - Philadelphia Eagles
1948 - Philadelphia Eagles
1947 - Chicago Cardinals
1946 - Chicago Bears
1945 - Cleveland Rams
1944 - Green Bay Packers
1943 - Chicago Bears
1942 - Washington Redskins
1941 - Chicago Bears
1940 - Chicago Bears
1939 - Green Bay Packers
1938 - New York Giants
1937 - Washington Redskins
1936 - Green Bay Packers
1935 - Detroit Lions
1934 - New York Giants
1933 - Chicago Bears
1932 - Chicago Bears
1931 - Green Bay Packers
1930 - Green Bay Packers
1929 - Green Bay Packers
1928 - Providence Steam Roller
1927 - New York Giants
1926 - Frankford Yellow Jackets
1925 - Chicago Cardinals
1924 - Cleveland Bulldogs
1923 - Canton Bulldogs
1922 - Canton Bulldogs
1921 - Chicago Staleys
1920 - Akron Pros