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. At Indianapolis, Chuck Rodee was killed while qualifying for the 1966 Indianapolis 500.