The 2018–19 Columbia Lions men's basketball team represented Columbia University in the 2018–19 NCAA Division I men's basketball season. They played their home games at Levien Gymnasium in New York City and were led by third-year head coach Jim Engles, as members of the Ivy League. They finished the season 10–18, 5–9 in Ivy League play to finish in seventh place. They failed to qualify for the Ivy League tournament.