Pro Football DynastiesFranchise Years League League Championships (Years) Notes

Green Bay Packers 1929–1931 NFL 3 (1929, 1930, 1931) Three NFL consecutive championships (first time)

Chicago Bears 1940–1946 NFL 4 (1940, 1941, 1943, 1946) Three NFL Championships in four years; Four NFL Championships in seven years; five NFL Championship Game appearances (1940, 1941, 1942, 1943, 1946). Perfect regular season in 1942.

Cleveland Browns 1946–1957 AAFC

NFL 7 (1946, 1947, 1948, 1949,

1950, 1954, 1955) Four AAFC Championships and three NFL Championships; Ten consecutive AAFC or NFL Championship Game appearances (1946–1955); 11 AAFC or NFL conference championships in 12 years (1946–1955, '57); Perfect season in '47

Detroit Lions 1952–1957 NFL 3 (1952, 1953, 1957) Three NFL Championships; four NFL Championship Game appearances in six years

Green Bay Packers 1961–1967 NFL 5 (1961, 1962, 1965, 1966, 1967) Five NFL Championships in seven years including Super Bowl I and II (World Championship Games); Three straight NFL Championships (second time)

Pittsburgh Steelers 1974–1979 NFL 4 (1974, 1975, 1978, 1979) Four Super Bowls in 6 years; six straight AFC Central division titles; 8 straight playoff berths; First team to win three Super Bowls; First team to win four Super Bowls; 10 Hall of Famers and a 4 Hall of Famer draft class in 1974, only team with as many in a single class, only head coach to win more than 3 Super Bowls (Chuck Noll), and only team to win back-to-back Super Bowls multiple times.

San Francisco 49ers 1981–1994 NFL 5 (1981, 1984, 1988, 1989, 1994) Four Super Bowls in nine years, Five total Super Bowls in fourteen years; Five straight division titles (once),

Four straight division titles (once); Thirteen total NFC West division titles; Sixteen straight winning seasons,

Seventeen of eighteen winning seasons during era. Sixteen consecutive seasons of 10 wins or more. Only team with 5-0 Super Bowl record.

Dallas Cowboys 1991–1995 NFL 3 (1992, 1993, 1995) First team to win three Super Bowls in four years; three NFC Championships in four straight appearances;

five straight NFC East division championships, six total NFC East titles

New England Patriots 2001–2007 NFL 3 (2001, 2003, 2004) Appearances in four Super Bowls in seven years; five AFC Championship Game appearances in seven years; five AFC East division titles in six years, winnings streaks of 18 and 21 straight games, first perfect regular season in 35 years but lost to the New York Giants in the Super Bowl XLII (first undefeated regular season in salary cap era)

I notice that to be a dynasty, this requires a team to have won at least 3 titles in a 10 year period.

Some teams that are not included on this list of dynasties include:

The 1970s Dolphins who appeared in 3 straight SBs, winning 2

The 1970s Cowboys who appeared in 5 SBs, winning only 2.

The 1982-1991 Redskins who won 3 SBs and lost another in that era under Joe Gibbs.

The 1976-1983 Raiders who won 3 SBs in 8 years

The 1920s Canton/Cleveland Bulldogs who won 3 straight titles (perhaps because they are considered separate franchises...even though they had the same coach and many of the same players)

The 2005 to current Steelers who won 2 SBs and lost another.

Should any of these in the latter group be moved to the upper group to be officially considered a "Dynasty"?