The 2017–18 Southern Utah Thunderbirds basketball team represented Southern Utah University during the 2017–18 NCAA Division I men's basketball season.

The Thunderbirds were led by second-year head coach Todd Simon and played their home games at the America First Events Center in Cedar City, Utah as members of the Big Sky Conference.

In the Big Sky tournament they defeated Idaho State and Idaho to advance to the semifinals where they lost to Eastern Washington.

The Thunderbirds finished the 2016–17 season 6–27, 3–15 in Big Sky play to finish in a tie for 11th.

11 seed in the Big Sky tournament, they defeated Montana State in the first round before losing to Weber State in the quarterfinals.