1921 AAA National Championship Kalender
| Race | Type | Land | Datum | Winnaar |
|---|---|---|---|---|
| Beverly Hills Beverly Hills Speedway |
Board Track |  |
27 Februari |
R. dePalma Ballot |
| Beverly Hills Beverly Hills Speedway |
Board Track | |
27 Februari |
R. Sarles Duesenberg |
| Beverly Hills Beverly Hills Speedway |
Board Track | |
27 Februari |
J. Murphy Duesenberg |
| Beverly Hills Beverly Hills Speedway |
Board Track | |
27 Februari |
T. Milton Durant/Duesenberg |
| Beverly Hills Beverly Hills Speedway |
Board Track | |
27 Februari |
R. dePalma Ballot |
| Beverly Hills Beverly Hills Speedway |
Board Track | |
10 April |
R. dePalma Ballot |
| Beverly Hills Beverly Hills Speedway |
Board Track | |
10 April |
E. Pullen Duesenberg |
| Beverly Hills Beverly Hills Speedway |
Board Track | |
10 April |
J. Thomas Duesenberg |
| Beverly Hills Beverly Hills Speedway |
Board Track | |
10 April |
J. Murphy Duesenberg |
| Beverly Hills Beverly Hills Speedway |
Board Track | |
10 April |
J. Murphy Duesenberg |
| Fresno Fresno Speedway |
Board Track | |
30 April |
J. Thomas Duesenberg |
| Indianapolis 500 Indianapolis |
Oval | |
30 Mei |
T. Milton Frontenac |
| Uniontown Uniontown Speedway |
Board Track | |
18 Juni |
R. Sarles Duesenberg |
| Tacoma Pacific Speedway |
Board Track | |
04 Juli |
T. Milton Miller/Durant |
| Cotati Cotati Speedway |
Board Track | |
14 Augustus |
E. Hearne Duesenberg |
| Uniontown Uniontown Speedway |
Board Track | |
05 September |
I. Fetterman Duesenberg |
| Fresno Fresno Speedway |
Board Track | |
01 Oktober |
E. Cooper Duesenberg |
| Cotati Cotati Speedway |
Board Track | |
23 Oktober |
R. Sarles Duesenberg |
| Beverly Hills Beverly Hills Speedway |
Board Track | |
24 November |
E. Hearne Duesenberg |
| San Carlos San Francisco Speedway |
Board Track | |
11 December |
J. Murphy Duesenberg |