| Mode: | Basketball |
| Year: | 1984–85 |
| Prev Year: | 1983–84 |
| Next Year: | 1985–86 |
| Team: | Marshall Thundering Herd |
| Conference: | Southern Conference |
| Short Conf: | SoCon |
| Record: | 21–13 |
| Conf Record: | 12–4 |
| Hc Year: | 2nd |
| Asst Coach1: | Dan Bell |
| Asst Coach3: | John Lyles |
| Champion: | SoCon tournament champions |
| Tourney Result: | First Round |
The 1984–85 Marshall Thundering Herd men's basketball team represented Marshall University during the 1984–85 NCAA Division I men's basketball season. The Thundering Herd, led by second-year head coach Rick Huckabay, played their home games at the Cam Henderson Center as members of the Southern Conference. They finished the season 21–13, 12–4 in SoCon play to finish in second place. They defeated, The Citadel, and VMI to become champions of the SoCon tournament. They received the SoCon's automatic bid to the NCAA tournament where, as a No. 15 seed, they lost to No. 2 seed VCU in the first round.
|-!colspan=8 style=| Regular season|-!colspan=8 style=| SoCon tournament|-!colspan=8 style=| NCAA tournament[2] [3] [4]