The 2009 Mountain West Conference men's basketball tournament was played at the Thomas & Mack Center in Las Vegas, Nevada from March 11–14, 2009. The tournament was sponsored by Conoco. The quarterfinal was broadcast live on the MountainWest Sports Network, the semifinal games on CBS College Sports Network, and the championship game on Versus. All games were available in HD. Of note, this was the first time that UNLV failed to make the championship game of the tournament when they were hosting. The Rebels did not play in the 2001 tournament due to a postseason ban.