The National Association for Stock Car Auto Racing (NASCAR) is the largest sanctioning body of motorsports in the United States. The three largest racing series sanctioned by NASCAR are the NEXTEL Cup, the Busch Series and the Craftsman Truck Series. It also oversees NASCAR Regional 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.

With roots as regional entertainment in the Southeastern U.S., NASCAR has grown to become the second-most popular professional sport in terms of television ratings inside the U.S., ranking behind only the National Football League. Internationally, NASCAR races are broadcast in over 150 countries. It holds 17 of the top 20 attended sporting events in the U.S.,1 and has 75 million fans who purchase over $3 billion in annual licensed product sales. These fans are considered the most brand-loyal in all of sports and as a result, Fortune 500 companies sponsor NASCAR more than any other sport.