| Mode: | Basketball |
| Year: | 2017–18 |
| Team: | Columbia Lions |
| Conference: | Ivy League |
| Short Conf: | Ivy |
| Record: | 8–19 |
| Conf Record: | 5–9 |
| Hc Year: | 2nd |
| Asst Coach2: | Jean Bain |
| Asst Coach3: | Jared Czech |
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.
The Lions finished the 2016–17 season 11–16, 5–9 in Ivy League play to finish in fifth place. They failed to qualify for the inaugural Ivy League tournament.
| Name | Number | Pos. | Height | Weight | Year | Hometown | Reason for departure | |
|---|---|---|---|---|---|---|---|---|
| 1 | F | 6'8" | 223 | Senior | Graduated | |||
| Andrew Panayiotou | 2 | F | 6'7" | 194 | Freshman | Left the team for personal reasons | ||
| Kendall Jackson | 14 | G | 5'8" | 160 | Senior | Graduated | ||
| John Sica | 24 | F | 6'7" | 195 | Sophomore | Left the team for personal reasons | ||
| Chris McComber | 32 | F | 6'8" | 244 | Senior | Graduated | ||
| 33 | F | 6'10" | 215 | Senior | Graduated | |||
| Connor Voss | 52 | C | 7'1" | 260 | Senior | Graduated |
|-!colspan=9 style=| Non-conference regular season|-!colspan=9 style=| Ivy League regular seasonSource[1] [2]