The 2018 Southern Utah Thunderbirds football team represented Southern Utah University in the 2018 NCAA Division I FCS football season. They were led by third-year head coach Demario Warren and played their home games at Eccles Coliseum in Cedar City, Utah as seventh-year as members of the Big Sky Conference. They finished the season 1–10, 1–7 in Big Sky play to finish in 12th place.