| 1975 USAC Championship Car season | |
|---|---|
| USAC National Championship Trail | |
| Season | |
| Races | 13 |
| Start date | March 2 |
| End date | November 9 |
| Awards | |
| National champion |  A. J. Foyt |
| Indianapolis 500 winner | Bobby Unser |
The 1975 USAC Championship Car season consisted of 13 races, beginning in Ontario, California on March 2 and concluding in Avondale, Arizona on November 9. The USAC National Champion was A. J. Foyt and the Indianapolis 500 winner was Bobby Unser.