2021 Dayton Flyers football team

The 2021 Dayton Flyers football team represented the University of Dayton in the 2021 NCAA Division I FCS football season as a member of the Pioneer Football League. They were led by 13th-year head coach Rick Chamberlin and played their home games at Welcome Stadium.

Preseason coaches' poll
The Pioneer League released their preseason coaches' poll on July 27, 2021. The Flyers were picked to finish in fourth place.

Preseason All-PFL teams
The Flyers had five players selected to the preseason all–PFL teams.

Offense

First team
 * Jack cook – QB
 * Jake chisholm – RB

Defense

First team Honorable mention
 * Brandon easterling – DB
 * Zach rumpke – LB

Special teams

Second team
 * Sam webster – PK

Schedule

 * Dayton's game with Robert Morris was cancelled due to a COVID-19 outbreak at Robert Morris. The game was not rescheduled.