| Mode: | Basketball |
| Year: | 1989–90 |
| Prev Year: | 1988–89 |
| Next Year: | 1990–91 |
| Team: | Towson Tigers |
| Conference: | East Coast Conference (Division I)East Coast Conference |
| Short Conf: | ECC |
| Record: | 18–13 |
| Conf Record: | 8–6 |
| Head Coach: | Terry Truax |
| Hc Year: | 7th |
| Stadium: | Towson Center |
| Champion: | ECC Regular season co-champions ECC tournament champions |
| Bowl: | NCAA tournament |
The 1989–90 Towson State Tigers men's basketball team represented Towson State University as a member of the East Coast Conference during the 1989–90 NCAA Division I men's basketball season. The team was led by head coach Terry Truax and played their home games at the Towson Center. They finished the season 18–13, 8–6 in ECC play to tie for the regular season conference title. The Tigers won the ECC tournament to earn an automatic bid to the NCAA tournament as No. 16 seed in the Midwest region. Towson State was defeated in the first round by top-ranked, No. 1 seed Oklahoma, 77–68.
|-!colspan=9 style=| Regular season|-!colspan=9 style=| ECC Tournament|-!colspan=9 style=| NCAA Tournament[2]