The 1983–84 Marshall Thundering Herd men's basketball team represented Marshall University during the 1983–84 NCAA Division I men's basketball season.
The Thundering Herd, led by first-year head coach Rick Huckabay, played their home games at the Cam Henderson Center as members of the Southern Conference.
They defeated Davidson, Appalachian State, and Chattanooga to become champions of the SoCon tournament.
They received the SoCon's automatic bid to the NCAA tournament where, as a No.
7 seed Villanova in the opening round.