The National Hockey League's American Division was formed after expansion in 1926. The division existed for 12 seasons until 1938. During its run as a separate division, the American Division was the slightly more successful of the league's two divisions. American Division teams won seven Stanley Cup championships compared with five won by the Canadian Division and contested three intra-divisional Finals under the cross-over playoff format then in use, compared to only one such Finals between two Canadian Division teams.

Division lineups

1926–1930

Changes from the 1925–26 season

1930–1931

Changes from the 1929–30 season

1931–1933

Changes from the 1930–31 season

1933–1938

Changes from 1932–33 season

After the 1937–38 season

The league collapsed into one single table, reverting to the format of the 1925–26 season, after the Montreal Maroons folded in 1938.

Division champions

Stanley Cup winners produced