The 2021 UNLV Rebels football team represented the University of Nevada, Las Vegas in the 2021 NCAA Division I FBS football season.

The Rebels were led by second–year head coach Marcus Arroyo and played their home games at Allegiant Stadium.

The Mountain West media days were held on July 21–22, 2021, at the Cosmopolitan in Paradise, Nevada.

The Rebels were predicted to finish in sixth place in the MW West Division.

This college football 2020s season article is a stub.