The 2013 Southern Utah Thunderbirds football team represented Southern Utah University in the 2013 NCAA Division I FCS football season. They were led by sixth year head coach Ed Lamb and played their home games at Eccles Coliseum. This was their second year as a member of the Big Sky Conference. They finished the season 8–5, 5–3 in Big Sky play to finish in a four way tie for fourth place. They received an at-large bid to the FCS Playoffs where they lost in the first round to Sam Houston State.
