| Year: | 1921 |
| Team: | NC State Aggies |
| Sport: | football |
| Conference: | South Atlantic Intercollegiate Athletic Association |
| Short Conf: | SAIAA |
| Record: | 3–3–3 |
| Conf Record: | 1–1–3 |
| Head Coach: | Harry Hartsell |
| Hc Year: | 2nd |
| Stadium: | Riddick Stadium |
| Next: | 1922 |
The 1921 NC State Aggies football team was an American football team that represented North Carolina State University during the 1921 college football season. In its second season under head coach Harry Hartsell, the team compiled a 3–3–3 record.