1975 USAC Championship Car season

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.

Schedule and results
All races running on Oval/Speedway.

{{legend|#FB9902|Non-championship race|border=solid 1px #AAAAAA}}
 * Scheduled for 500 miles, stopped early due to rain.
 * Scheduled for 500 miles, stopped early due to rain.

Final points standings
Note1: Bobby Allison and George Follmer not eligible for points. Note2: Jerry Grant scored points at Ontario but competed with an FIA License Note3: Bentley Warren scored 100 points at Pocono, but forfeited those points due to a rule violation