The 2009–10 New Mexico State Aggies men's basketball team represented New Mexico State University in the 2009–10 college basketball season. This was Marvin Menzies 3rd season as head coach. The Aggies played their home games at Pan American Center and competed in the Western Athletic Conference. They finished the season 22–12, 11–5 in WAC play. They won the 2010 WAC men's basketball tournament to earn the conference's automatic bid to the 2010 NCAA Division I men's basketball tournament. They earned a 12 seed in the Midwest Region where they were defeated by 5 seed and AP #13 Michigan State in the first round.