The 2015–16 Northwestern State Demons basketball team represented Northwestern State University during the 2015–16 NCAA Division I men's basketball season. The Demons, led by 17th year head coach Mike McConathy, played their home games at Prather Coliseum and were members of the Southland Conference. They finished the season with a record of 8–20, 5–13 to finish 12th place in conference. As a result, they failed to qualify for the Southland tournament.