1973 USAC National Championship Schedule
| Race | Type | Country | Date (ET) | Winner |
|---|---|---|---|---|
| Texas Texas World Speedway |
Oval |  |
April 7 |
A. Unser Parnelli-Drake-Offy |
| Trenton Trenton Speedway |
Oval | |
April 15 |
A. Foyt Coyote-Foyt |
| Trenton Trenton Speedway |
Oval | |
April 15 |
M. Andretti Parnelli-Drake-Offy |
| Indianapolis 500 Indianapolis |
Oval | |
May 30 |
G. Johncock Eagle-Drake-Offy |
| Rex Mays Classic Milwaukee Mile |
Oval | |
June 10 |
B. Unser Eagle-Drake-Offy |
| Pocono Pocono |
Oval | |
July 1 |
A. Foyt Coyote-Foyt |
| Michigan Michigan International Raceway |
Oval | |
July 15 |
R. McCluskey McLaren-Drake-Offy |
| Tony Bettenhausen 200 Milwaukee Mile |
Oval | |
August 12 |
W. Dallenbach Eagle-Drake-Offy |
| Ontario Ontario Motor Speedway |
Oval | |
August 26 |
W. Dallenbach Eagle-Drake-Offy |
| Ontario Ontario Motor Speedway |
Oval | |
August 26 |
J. Rutherford McLaren-Drake-Offy |
| Ontario Ontario Motor Speedway |
Oval | |
September 2 |
W. Dallenbach Eagle-Drake-Offy |
| Michigan Michigan International Raceway |
Oval | |
September 16 |
B. Vukovich Jr. Eagle-Drake-Offy |
| Michigan Michigan International Raceway |
Oval | |
September 16 |
J. Rutherford McLaren-Drake-Offy |
| Trenton Trenton Speedway |
Oval | |
September 23 |
G. Johncock Eagle-Drake-Offy |
| Texas Texas World Speedway |
Oval | |
October 6 |
G. Bettenhausen McLaren-Drake-Offy |
| Phoenix Phoenix Raceway |
Oval | |
November 3 |
G. Johncock Eagle-Drake-Offy |