The 2009–10 Texas A&M Aggies men's basketball team represented Texas A&M University in the 2009-10 NCAA Division I men's basketball season. The team was led by third-year head coach Mark Turgeon, who coached the team to a 24–10 record and an NCAA tournament appearance in the previous season. The Aggies play their home games in Reed Arena. The team was picked to finish fifth in the Big 12 in the preseason coaches' poll but finished tied for second. With their 22–8 regular-season finish and 11–5 mark in conference play, the Aggies participated in the 2010 Big 12 men's basketball tournament and defeated Nebraska before losing to No. 1 Kansas in the semifinals. They received an at–large bid to the 2010 NCAA Division I men's basketball tournament and earned a 5 seed in the South Region. They defeated 12 seed Utah State in the first round before falling to 4 seed Purdue in overtime in the second round to finish their season at 24–10. In the final Coaches' Poll, the Aggies were ranked No. 25.
Pre-season
Nearly all of the contributors from the previous year's NCAA Tournament second-round team returned for the Aggies, including seniors Donald Sloan, Derrick Roland and Bryan Davis, along with juniors B.J. Holmes and Nathan Walkup and sophomores David Loubeau and Dash Harris. Despite that, the Aggies began the year unranked. A&M faced a much tougher non-conference schedule than they had played in recent years, featuring a trip to Los Angeles for the 76 Classic. Among the other participants in the tournament were nationally ranked West Virginia, Butler, Minnesota and Clemson. Their other marquee matchup before the beginning of conference play was scheduled against the preseason-No. 14 Washington Huskies. Though the Aggies were not ranked in any major poll, they received votes in both the AP and Coaches' polls.
Departures
The main factors contributing to A&M's being unranked in the preseason were the departures of senior guard Josh Carter—the winningest player in Aggie basketball history—and junior post player Chinemelu Elonu, two of the team's starters the previous year. Carter graduated and signed a contract to play in Germany, while Elonu was drafted in the second round of the NBA draft. The loss of Elonu, who along with Bryan Davis constituted much of the Aggies' inside game, was tabbed as being especially detrimental to the team's hopes for success as the 2009-10 season began.
Recruiting
In 2008 the Aggies received commitments from four-star rated Naji Hibbert and three-star prospects Khris Middleton, Kourtney Roberson and Ray Turner. They later added Jeremy Adams to a class that narrowly missed being ranked in the top 25 classes nationally by ESPN. Roberson was later declared ineligible and, after waiting one year, will join the nationally ranked A&M class of 2010. Turner was ineligible for the fall semester and joined the team in January, bringing an immediate impact. While Hibbert, who was the prize recruit of the class, contributed in many ways as a freshman, it was Middleton, called the best-shooting forward in the high school class of 2009 by many, who later became a starter and threw his name into the ring as a potential future star for the Aggies.
Class of 2009
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| colspan="7" style="padding-left:10px;" | Overall Recruiting Rankings: Scout – NR Rivals – NR ESPN – 27 |}