| Year: | 2012 |
| Conference: | Atlantic Sun |
| Division: | I |
| Gender: | Men's |
| Teams: | 8 |
| Arena: | University Center |
| City: | Macon, Georgia |
| Champions: | Belmont |
| Titlecount: | 5th |
| Coach: | Rick Byrd |
| Coachcount: | 5th |
| Mvp: | Kerron Johnson |
| Mvpteam: | Belmont |
The 2012 Atlantic Sun men's basketball tournament took place from February 29 – March 3, 2012 at University Center in Macon, Georgia. Belmont, in its final year in the A-Sun before moving to the Ohio Valley Conference, won the tournament and with it an automatic bid to the NCAA tournament.
The A-Sun Championship was a four-day single-elimination tournament. Eight teams competed in the championship and the participants were determined by conference winning percentage. The winner of the tournament earned the A-Sun's automatic bid into the 2012 NCAA tournament.