1966 USAC Championship Car season

The 1966 USAC Championship Car season consisted of 16 races, beginning in Avondale, Arizona on March 20 and concluding at the same location on November 20. There was also one non-championship event at Fuji Speedway in Japan. The USAC National Champion was Mario Andretti, and the Indianapolis 500 winner was Graham Hill.

Schedule and results
{{legend|#FFFFFF|Paved/Dirt Oval|border=solid 1px #AAAAAA}} {{legend|#D0E7FF|Road Course/Hill Climb|border=solid 1px #AAAAAA}} {{legend|#FB9902|Non-championship race|border=solid 1px #AAAAAA}}