The 2018–19 Bucknell Bison men's basketball team represented Bucknell University during the 2018–19 NCAA Division I men's basketball season. The Bison, led by fourth-year head coach Nathan Davis, played their home games at Sojka Pavilion in Lewisburg, Pennsylvania as members of the Patriot League. They finished the season 21–12, 13–5 to earn a share of the regular season Patriot League championship. As the No. 2 seed in the Patriot League tournament, they defeated Holy Cross and Lehigh before losing to Colgate in the championship game. They were not selected for postseason play.