| Year: | 1991 |
| Conference: | Big Eight Conference |
| Division: | I |
| Gender: | Men's |
| Teams: | 8 |
| Finalarena: | Kemper Arena |
| Finalcity: | Kansas City, MO |
| Champions: | Missouri |
| Titlecount: | 5th |
| Coach: | Norm Stewart |
| Coachcount: | 5th |
| Mvp: | Doug Smith |
| Mvpteam: | Missouri |
| Television: | Raycom Sports (Quarterfinals, Semi-Finals and Championship) ABC(Championship game) |
The 1991 Big Eight Conference men's basketball tournament was held March 8–10 at Kemper Arena in Kansas City, Missouri.[1]
Fourth-seeded Missouri defeated #3 seed Nebraska in the championship game, 90–82. The Tigers were ineligible to play in the 1991 NCAA tournament. Kansas, Oklahoma State, and Nebraska received at-large bids.