| Year: | 2009 |
| Conference: | Big Sky Conference |
| Division: | I |
| Gender: | Men's |
| Teams: | 6 |
| 1Stroundarena: | campus sites |
| Semiarena: | Dee Events Center |
| Semicity: | Ogden, UT |
| Finalarena: | Dee Events Center |
| Finalcity: | Ogden, UT |
| Champions: | Portland State |
| Titlecount: | 2nd |
| Coach: | Ken Bone |
| Coachcount: | 2nd |
| Mvpteam: | Portland State |
The Big Sky Conference men's basketball tournament took place from March 7–11, 2009. The winner, Portland State, advanced to the NCAA tournament. Teams were re-seeded after the first round.