American Division

The NHL's American Division was formed after expansion in 1926. The division existed for 12 seasons until 1938.

1926–1930

 * Boston Bruins
 * Chicago Blackhawks
 * Detroit Cougars
 * New York Rangers
 * Pittsburgh Pirates

Changes from 1925–1926 season

 * The NHL split into two divisions, the American and the Canadian
 * The Chicago Blackhawks (formerly the Portland Rosebuds) and the Detroit Cougars (formerly the Victoria Cougars) were admitted from the Western Hockey League
 * The New York Rangers were admitted as an expansion team

1931–1932

 * Boston Bruins
 * Chicago Blackhawks
 * Detroit Falcons
 * New York Rangers
 * Philadelphia Quakers

Changes from 1930–1931 season

 * Detroit changed their nickname from the Cougars to the Falcons
 * The Pittsburgh Pirates moved to Philadelphia, Pennsylvania to become the Philadelphia Quakers

1932–1933

 * Boston Bruins
 * Chicago Blackhawks
 * Detroit Falcons
 * New York Rangers

Changes from 1931–1932 season

 * The Philadelphia Quakers folded due to financial problems

1933–1938

 * Boston Bruins
 * Chicago Blackhawks
 * Detroit Red Wings
 * New York Rangers

Changes from 1932–1933 season

 * Detroit changed their nickname from the Falcons to the Red Wings

After the 1937–1938 season
The league collapsed into one single table, reverting to the format before the 1926–1927 season

Division Champions

 * 1927 - New York Rangers
 * 1928 - Boston Bruins
 * 1929 - Boston Bruins
 * 1930 - Boston Bruins
 * 1931 - Boston Bruins
 * 1932 - New York Rangers
 * 1933 - Boston Bruins
 * 1934 - Detroit Red Wings
 * 1935 - Boston Bruins
 * 1936 - Detroit Red Wings
 * 1937 - Detroit Red Wings
 * 1938 - Boston Bruins

Stanley Cup Winners produced

 * 1928 - New York Rangers
 * 1929 - Boston Bruins
 * 1933 - New York Rangers
 * 1934 - Chicago Black Hawks
 * 1936 - Detroit Red Wings
 * 1937 - Detroit Red Wings
 * 1938 - Chicago Black Hawks