The United States Auto Club (USAC) is a sanctioning body and the premier series for non-winged sprint car racing throughout the United States. From 1956 to 1979, the USAC sanctioned the United States National Championship, and from 1956 to 1997 the organization sanctioned the Indianapolis 500. In fact, the USAC was created to serve as the sanctioning body for open-wheel cars.
The purpose and mission of the United States Auto Club is to develop racing rules and specifications, enforce those rules and specifications via trained officials, and create and organize the racing framework for racing participants and those who organize the races.
Today, the USAC is the governing body for the following amateur and professional series:
- The Silver Crown Series
- National Sprint Car Series
- Mopar Midget National Championship
- Ford Focus Series
- .25 Midgets