The 1991 WCHA Men's Ice Hockey Tournament was the 32nd conference playoff in league history and 39th season where a WCHA champion was crowned. The tournament was played between March 1 and March 11, 1991. First round games were played at home team campus sites while all 'Final Four' matches were held at the Civic Center in St. Paul, Minnesota. By winning the tournament, Northern Michigan was awarded the Broadmoor Trophy and received the WCHA's automatic bid to the 1991 NCAA Division I Men's Ice Hockey Tournament.