The 2002–03 Troy State Trojans men's basketball team represented Troy University during the 2002–03 NCAA Division I men's basketball season.

The Trojans, led by 21st-year head coach Don Maestri, played their home games at Trojan Arena in Troy, Alabama and were members of the Sun Belt Conference.

They defeated Samford, Georgia State, and Central Florida to win the Sun Belt tournament championship.

As a result, they received the conference's automatic bid to the NCAA tournament – the first in program history.

14 seed in the South region, they were beaten by Xavier in the opening round.