The 2004–05 AHL season was the 69th season of the American Hockey League. Twenty-eight teams played 80 games each in the schedule. The Rochester Americans finished first overall in the regular season. The Philadelphia Phantoms won the Calder Cup, defeating the Chicago Wolves in the finals.

The Rochester Americans are a professional ice hockey team in the American Hockey League; the team is an owned and operated affiliate of the Buffalo Sabres. The team plays its home games in Rochester, New York, at the Blue Cross Arena at the War Memorial. The Americans are the fourth oldest franchise in the AHL, and have the second longest continuous tenure among AHL teams in their current locations after the Hershey Bears.