The 2015–16 Mount St. Mary's Mountaineers men's basketball team represented Mount St. Mary's University during the 2015–16 NCAA Division I men's basketball season. The Mountaineers, led by fourth-year head coach Jamion Christian, played their home games at Knott Arena and were members of the Northeast Conference. Returning players included Byron "BK" Ashe and Gregory Graves, who were both members of the NEC's All-Conference Third Team the previous season. Lamont "Junior" Robinson, now a sophomore, was named to the All-Conference Rookie Team in his freshman year.