| 1991 CIAU University Cup | |
| Venues: | Varsity Arena, Toronto, Ontario |
| Winners: | Quebec–Trois-Rivières Patriotes |
| Count: | 2 |
| Second: | Alberta Golden Bears |
| Dates: | March 22–24 |
| Games: | 3 |
| Num Teams: | 4 |
| Award Title: | MVP |
| Prev Season: | 1990 |
| Next Season: | 1992 |
The 1991 CIAU Men's University Cup Hockey Tournament (29th annual) was held at the Varsity Arena in Toronto, Ontario. The Toronto Varsity Blues served as tournament host.
Note: * denotes overtime period(s)
Note: * denotes overtime period(s)
Note: * denotes overtime period(s)
The bracket matches rotated so that the Atlantic entry played the Quebec entry while the Ontario entry played the Western entry in the semifinals. All rounds were single elimination.
| Team | Qualification | Record | Appearance | Last | |
|---|---|---|---|---|---|
| West: Canada West Champion | 23–8–2 | 19th | 1989 | ||
| Atlantic: AUAA Champion | 20–13–1 | 4th | 1988 | ||
| Quebec: OUAA Champion | 23–4–1 | 5th | 1990 | ||
| Ontario: OUAA Runner-up | 22–5–2 | 2nd | 1974 |
Note: * denotes overtime period(s)[1]