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.