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.

• The Binghamton Whalers became the Binghamton Rangers.
• The Sherbrooke Canadiens moved to Fredericton, New Brunswick, becoming the Fredericton Canadiens.
• The Capital District Islanders joined the AHL as an expansion team, based in Troy, New York, playing in the South Division.

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

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

• complete list

Note: Preliminary Round was played as a two-game, total-goals series

Team awards

Individual awards

Other awards

• List of AHL seasons

• AHL official site
• AHL Hall of Fame