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.

2 seed in the Patriot League tournament, they defeated Holy Cross and Lehigh before losing to Colgate in the championship game.

They defeated Loyola (MD), Boston University and Colgate to win the Patriot League tournament championship.

As a result, they received the Patriot League's automatic bid to the NCAA tournament where they lost in the first round to Michigan State.