2021 AMA Supercross Championship
| 2021 AMA Supercross Championship | |
|---|---|
| Organizer | American Motorcyclist Association, Feld Entertainment (except Daytona), NASCAR Holdings, Inc. (Daytona) |
| Discipline | Supercross |
| Duration | January – May 2021 |
| Number of races | 17 |
| TV partner(s) | NBC Sports (NBC, NBCSN) |
| Champions | |
| 450cc | Cooper Webb |
| 250cc West | Colt Nichols |
| 250cc West | Justin Cooper |
The 2021 AMA Supercross Championship was the 48th season of professional Supercross racing in the United States. The series is sanctioned by the FIM as the world championship of the sport.