The 2009–10 Western Athletic Conference men's basketball season began with practices on October 17, 2009 and ended with the 2010 WAC men's basketball tournament March 11–13, 2010 at the Lawlor Events Center in Reno, NV on the campus of the University of Nevada.

Utah State won the regular season championship while New Mexico State won the WAC Tournament.

The WAC conducted a media teleconference on October 20, 2009 and released the media and coaches poll, as well as the preseason All-WAC teams and player of the year.

[1] [2] Player of the Year [3] First Team Second Team Player of the Year Players of the week: On January 26 San Jose State's Adrian Oliver was named the Oscar Robertson National Player of the Week by the U.S. Basketball Writers Association for games ending the week of January 24.

First round (12) New Mexico State vs. (5) Michigan State L 70–67 (12) Utah State vs. (5) Texas A&M L 69–53 First round (6) Nevada @ (3) Wichita State W 74–70 Second round (6) Nevada @ (2) Rhode Island L 85–83 First round Louisiana Tech vs. Southern Mississippi W 66–57 Quarterfinals Louisiana Tech @ Missouri State L 69–40 Prior to the day of the draft, the following trades were made and resulted in exchanges of draft picks between the teams.