1973 USAC National Championship Kalender
| Race | Type | Land | Datum | Winnaar |
|---|---|---|---|---|
| Texas Texas World Speedway |
Oval |  |
07 April |
A. Unser Parnelli-Drake-Offy |
| Trenton Trenton Speedway |
Oval | |
15 April |
A. Foyt Coyote-Foyt |
| Trenton Trenton Speedway |
Oval | |
15 April |
M. Andretti Parnelli-Drake-Offy |
| Indianapolis 500 Indianapolis |
Oval | |
30 Mei |
G. Johncock Eagle-Drake-Offy |
| Rex Mays Classic Milwaukee Mile |
Oval | |
10 Juni |
B. Unser Eagle-Drake-Offy |
| Pocono Pocono |
Oval | |
01 Juli |
A. Foyt Coyote-Foyt |
| Michigan Michigan International Raceway |
Oval | |
15 Juli |
R. McCluskey McLaren-Drake-Offy |
| Tony Bettenhausen 200 Milwaukee Mile |
Oval | |
12 Augustus |
W. Dallenbach Eagle-Drake-Offy |
| Ontario Ontario Motor Speedway |
Oval | |
26 Augustus |
W. Dallenbach Eagle-Drake-Offy |
| Ontario Ontario Motor Speedway |
Oval | |
26 Augustus |
J. Rutherford McLaren-Drake-Offy |
| Ontario Ontario Motor Speedway |
Oval | |
02 September |
W. Dallenbach Eagle-Drake-Offy |
| Michigan Michigan International Raceway |
Oval | |
16 September |
B. Vukovich Jr. Eagle-Drake-Offy |
| Michigan Michigan International Raceway |
Oval | |
16 September |
J. Rutherford McLaren-Drake-Offy |
| Trenton Trenton Speedway |
Oval | |
23 September |
G. Johncock Eagle-Drake-Offy |
| Texas Texas World Speedway |
Oval | |
06 Oktober |
G. Bettenhausen McLaren-Drake-Offy |
| Phoenix Phoenix Raceway |
Oval | |
03 November |
G. Johncock Eagle-Drake-Offy |