The 2002–03 Sam Houston State Bearkats men's basketball team represented Sam Houston State University in the 2002–03 college basketball season.
This was head coach Bob Marlin's fifth season at Sam Houston State.
The Bearkats competed in the Southland Conference and played their home games at Bernard Johnson Coliseum.
They finished the season 23–7, 17–3 in Southland play to capture the regular season championship.
They also were champions of the 2003 Southland Conference men's basketball tournament to earn the conferences automatic bid to the 2003 NCAA Division I men's basketball tournament.