The 1966 NCAA Men's Division i Ice Hockey Tournament involved 4 schools playing in single-elimination play to determine the national champion of NCAA Division 1. The tournament began on March 16, 1966. The National Championship Game was on March 18, 1966. A total of four games were played at Williams Arena in Minneapolis, Minnesota. Michigan State defeated Clarkson for its first national championship.
| Semi-finals | Finals | |||||||
| Clarkson | 4 | |||||||
| Denver | 3 | |||||||
| Clarkson | 1 | |||||||
| Michigan State | 6 | |||||||
| Boston University | 1 | |||||||
| Michigan State | 2 | |||||||
Consolation Game: Denver 4, Boston University 3
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