| Year: | 2021 |
| Team: | Princeton Tigers |
| Sport: | football |
| Conference: | Ivy League |
| Short Conf: | Ivy |
| Statsrank: | 24 |
| Fcscoachrank: | 21 |
| Record: | 9–1 |
| Conf Record: | 6–1 |
| Head Coach: | Bob Surace |
| Hc Year: | 11th |
| Off Coach: | Mike Willis |
| Oc Year: | 1st |
| Def Coach: | Steve Verbit |
| Stadium: | Powers Field at Princeton Stadium |
| Champion: | Ivy League co-champion |
| Prev Year: | 2019 |
The 2021 Princeton Tigers football team represented Princeton University in the 2021 NCAA Division I FCS football season as a member of the Ivy League. The team was led by 11th-year head coach Bob Surace and played its home games at Powers Field at Princeton Stadium. Princeton averaged 7,018 fans per game.