1921 AAA National Championship Schedule
| Race | Type | Country | Date (ET) | Winner |
|---|---|---|---|---|
| Beverly Hills Beverly Hills Speedway |
Board Track |  |
February 27 |
R. dePalma Ballot |
| Beverly Hills Beverly Hills Speedway |
Board Track | |
February 27 |
R. Sarles Duesenberg |
| Beverly Hills Beverly Hills Speedway |
Board Track | |
February 27 |
J. Murphy Duesenberg |
| Beverly Hills Beverly Hills Speedway |
Board Track | |
February 27 |
T. Milton Durant/Duesenberg |
| Beverly Hills Beverly Hills Speedway |
Board Track | |
February 27 |
R. dePalma Ballot |
| Beverly Hills Beverly Hills Speedway |
Board Track | |
April 10 |
R. dePalma Ballot |
| Beverly Hills Beverly Hills Speedway |
Board Track | |
April 10 |
E. Pullen Duesenberg |
| Beverly Hills Beverly Hills Speedway |
Board Track | |
April 10 |
J. Thomas Duesenberg |
| Beverly Hills Beverly Hills Speedway |
Board Track | |
April 10 |
J. Murphy Duesenberg |
| Beverly Hills Beverly Hills Speedway |
Board Track | |
April 10 |
J. Murphy Duesenberg |
| Fresno Fresno Speedway |
Board Track | |
April 30 |
J. Thomas Duesenberg |
| Indianapolis 500 Indianapolis |
Oval | |
May 30 |
T. Milton Frontenac |
| Uniontown Uniontown Speedway |
Board Track | |
June 18 |
R. Sarles Duesenberg |
| Tacoma Pacific Speedway |
Board Track | |
July 4 |
T. Milton Miller/Durant |
| Cotati Cotati Speedway |
Board Track | |
August 14 |
E. Hearne Duesenberg |
| Uniontown Uniontown Speedway |
Board Track | |
September 5 |
I. Fetterman Duesenberg |
| Fresno Fresno Speedway |
Board Track | |
October 1 |
E. Cooper Duesenberg |
| Cotati Cotati Speedway |
Board Track | |
October 23 |
R. Sarles Duesenberg |
| Beverly Hills Beverly Hills Speedway |
Board Track | |
November 24 |
E. Hearne Duesenberg |
| San Carlos San Francisco Speedway |
Board Track | |
December 11 |
J. Murphy Duesenberg |