The National Association for Stock Car Auto Racing (NASCAR) is the largest sanctioning body of stock cars in the United States. The three largest racing series sanctioned by NASCAR are the Sprint Cup, the Nationwide Series and the Camping World Truck Series.

It also oversees NASCAR Local Racing, the Whelen Modified Tour, and the Whelen All-American Series. NASCAR sanctions over 1,500 races at over 100 tracks in 39 states, Canada, and Mexico. From 1996 to 1998, NASCAR held exhibition races in Japan and an exhibition race in Australia in 1988.