1991 Manitoba Senior AAA Playoffs

For the 1990-91 season, the Manitoba Amateur Hockey Association awarded the Manitoba Senior AAA Championship, the Pattison Cup, to the winner of the Central Amateur Senior Hockey League.

see 1990-91 Central Amateur Senior Hockey League Season

Thunder Bay Twins won the Pattison Cup and advanced to the 1990-91 Western Canada Allan Cup Playoffs Manitoba Senior AAA Hockey History