2003 Southland Conference men's basketball tournament

The 2003 Southland Conference men's basketball tournament took place March 10–14, 2003. The quarterfinal and semifinal rounds were played at the home arena of the higher seeded-teams, with the championship game played at Bernard Johnson Coliseum in Huntsville, Texas.

Top-seeded Sam Houston State won the championship game over second-seeded, and earned the conference's automatic bid to the NCAA tournament. Donald Cole of Sam Houston State was named the tournament's MVP.

Format
The top six eligible men's basketball teams in the Southland Conference received a berth in the conference tournament. After the conference season, teams were seeded by conference record. For the semifinal round, the remaining teams were reseeded.