The 1990–91 AHL season was the 55th season of the American Hockey League. Fifteen teams played 80 games each in the schedule. The Rochester Americans finished first overall in the regular season. The Springfield Indians won their seventh and final Calder Cup championship.

Team changes

Final standings

Note: GP = Games played; W = Wins; L = Losses; T = Ties; GF = Goals for; GA = Goals against; Pts = Points;

Scoring leaders

Note: GP = Games played; G = Goals; A = Assists; Pts = Points; PIM = Penalty minutes

Calder Cup playoffs

Trophy and award winners