2012 Mountain West Conference men's basketball tournament

The 2012 Mountain West Conference men's basketball tournament was played at the Thomas & Mack Center in Las Vegas, Nevada in March 2012. Sponsored by Conoco; it was the first tournament without BYU or Utah, but included newcomer Boise State.

San Diego State won the conference tournament championship game over New Mexico, 68–59, to earn an automatic trip to the NCAA tournament.