The 1966 CIAU Men's University Cup Hockey Tournament (4th annual) was held in Sudbury, Ontario. The Laurentian Voyageurs served as tournament hosts.
<small>Note: No playoffs.</small>
no playoffs
<small>Note: * denotes overtime period(s)</small>
no playoff
No playoff
The CIAU invited the champions of five conferences to play for the championship. With the field increasing to five teams, the entrants now arranged by a new method; the participants would be arranged into two groupings, last year's finalists and non-finalists. The two groups would be sorted independently with the finalists being given the top two seeds and the non-finalists seeds three through five. The top three seeds would then receive byes into the semifinal round with the top overall seed awaiting the winner of the lone quarterfinal match.
<small>Note: * denotes overtime period(s)</small>