| Year: | 1991 |
| Conference: | Midwestern Collegiate Conference |
| Division: | I |
| Gender: | Men's |
| Teams: | 8 |
| Arena: | UD Arena |
| City: | Dayton, Ohio |
| Champions: | Xavier |
| Titlecount: | 6th |
| Coach: | Pete Gillen |
| Coachcount: | 5th |
| Mvp: | Jamie Gladden |
| Mvpteam: | Xavier |
The 1991 Midwestern Collegiate Conference men's basketball tournament (now known as the Horizon League men's basketball tournament) was held March 7–9 at UD Arena in Dayton, Ohio.[1]
Xavier defeated in the championship game, 81–65, to win their sixth MCC/Horizon League men's basketball tournament title.
The Musketeers received an automatic bid to the 1991 NCAA tournament as the #14 seed in the Midwest region.
All eight conference members participated in the tournament and were seeded based on regular season conference records.