The 2015–16 Lamar Cardinals basketball team represented Lamar University during the 2015–16 NCAA Division I men's basketball season. The Cardinals were led by second year head coach Tic Price. The team played their home games at the Montagne Center in Beaumont, Texas and are members of the Southland Conference. The Cardinals finished the season with a record of 11–19, 3–15 to finish in last place in conference. As a result, they failed to qualify for the Southland tournament.