The 2017–18 Marshall Thundering Herd men's basketball team represented the Marshall University during the 2017–18 NCAA Division I men's basketball season. The Thundering Herd, led by fourth-year head coach Dan D'Antoni, played their home games at the Cam Henderson Center as members of Conference USA. They finished the season 25–11, 12–6 in C-USA play to finish in fourth place. They defeated UTSA, Southern Miss, and Western Kentucky to become champions of the C-USA tournament. They received C-USA's automatic bid to the NCAA tournament where, as a No. 13 seed, they upset Wichita State in the first round before losing to West Virginia in the second round.