The 1989 Allan Cup was the Canadian senior ice hockey championship for the 1988–89 senior "AAA" season. The event was hosted by the Thunder Bay Twins in Thunder Bay, Ontario. The 1989 tournament marked the 81st time that the Allan Cup has been awarded.
Round Robin
St. Boniface Mohawks 5 - Thunder Bay Twins 3
St. Boniface Mohawks 4 - Bassano Hawks 2
Thunder Bay Twins 6 - Equipe Chomedey Montreal 3
Equipe Chomedey Montreal 8 - Bassano Hawks 7 (OT)
Thunder Bay Twins 7 - Bassano Hawks 1
St. Boniface Mohawks 9 - Equipe Chomedey Montreal 7Semi-final
Thunder Bay Twins 6 - Equipe Chomedey Montreal 3Best-of-3 Final
Thunder Bay Twins 2 - St. Boniface Mohawks 0
Thunder Bay Twins 4 - St. Boniface Mohawks 2