| Year: | 2021 |
| Team: | Southern Utah Thunderbirds |
| Sport: | football |
| Conference: | Big Sky Conference |
| Short Conf: | Big Sky |
| Record: | 1–10 |
| Conf Record: | 0–8 |
| Head Coach: | Demario Warren |
| Hc Year: | 6th |
| Off Coach: | Matt Wade |
| Oc Year: | 2nd |
| Def Coach: | Robert Bala |
| Dc Year: | 2nd |
The 2021 Southern Utah Thunderbirds football team represented Southern Utah University in the 2021 NCAA Division I FCS football season. They were led by sixth-year head coach Demario Warren and played their home games at Eccles Coliseum in Cedar City, Utah. They played their final season as a member of the Big Sky Conference, as they would depart for the Western Athletic Conference for the 2022 season.
On July 26, 2021, during the virtual Big Sky Kickoff, the Thundebirds were predicted to finish eleventh in the Big Sky by both the coaches and media.[1]
| 1 | Weber State | (7) | |
| 2 | Montana | (3) | |
| 3 | Eastern Washington | (2) | |
| 4 | Montana State | (1) | |
| 5 | Sacramento State | (1) | |
| 6 | UC Davis | ||
| 7 | Northern Arizona | ||
| 8 | Idaho | ||
| 9 | Idaho State | ||
| 10 | Portland State | ||
| 11 | Southern Utah | ||
| 12 | Cal Poly | ||
| 13 | Northern Colorado |
| 1 | Weber State | (14) | |
| 2 | Montana | (4) | |
| 3 | Eastern Washington | (3) | |
| 4 | Montana State | (3) | |
| 5 | Sacramento State | ||
| 6 | UC Davis | ||
| 7 | Northern Arizona | ||
| 8 | Idaho | ||
| 9 | Idaho State | ||
| 10 | Portland State | ||
| 11 | Southern Utah | ||
| 12 | Northern Colroado | ||
| 13 | Cal Poly |
The Thunderbirds had one player selected to the preseason all-Big Sky team.[2]
Defense
La'akea Kaho'ohanohano-Davis – OL
Conference opponents not played this season: Cal Poly, Idaho State, Montana State, UC Davis
See also: 2021 San Jose State Spartans football team.
See also: 2021 Arizona State Sun Devils football team.
See also: 2021 Tarleton State Texans football team.
See also: 2021 Eastern Washington Eagles football team.
See also: 2021 Portland State Vikings football team.
See also: 2021 Sacramento State Hornets football team.
See also: 2021 Northern Arizona Lumberjacks football team and Grand Canyon Rivalry.
See also: 2021 Northern Colorado Bears football team.
See also: 2021 Montana Grizzlies football team.
See also: 2021 Idaho Vandals football team.
See also: 2021 Weber State Wildcats football team and Beehive Bowl.