The 2017–18 Columbia Lions men's basketball team represented Columbia University during the 2017–18 NCAA Division I men's basketball season. The Lions, led by second-year head coach Jim Engles, played their home games at Levien Gymnasium in New York City as members of the Ivy League. They finished the season 8–19, 5–9 in Ivy League play to finish in a tie for fifth place and fail to qualify for the Ivy League tournament.