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 Craftsman 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.

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.[http://www.nascar.com/guides/about/nascar/ nascar.Com ] 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 governing body. In 2007 NASCAR made a profit of just under $3 billion, and was the second richest motorsport (Formula One was first).

NASCAR's headquarters are located in Daytona Beach, Florida, although it also maintains offices in four North Carolina cities: Charlotte, Mooresville, Concord, and Conover. Regional offices are also located in New York City, Los Angeles, Arkansas, and international offices in Mexico City and Toronto. Additionally, owing to its southern roots, all but a handful of NASCAR teams are still based in North Carolina, especially near Charlotte.

Early stock car racing

In the 1920s and 1930s, Daytona Beach became known as the place to set world land speed records, supplanting France and Belgium as the preferred location for land speed records, with 8 consecutive world records set between 1927 and 1935. After a historic race between Ransom Olds and Alexander Winton in 1903, the beach became a mecca for racing enthusiasts and fifteen records were set on what became the Daytona Beach road course between 1905 and 1935. By the time the Bonneville Salt Flats became the premier location for pursuit of land speed records, in 1936, Daytona beach had become synonymous with fast cars. Drivers raced a 1.5 to stretch of beach as one straightaway and beachfront highway A1A as the other.

Stock car racing in the United States has its origins in bootlegging during Prohibition, when drivers ran bootleg whiskey made in Appalachia. Bootleggers needed to distribute their illicit products, and they typically used small, fast vehicles to better evade the police. Many of the drivers would modify their cars for speed and handling, as well as increased cargo capacity, and some of them came to love the fast-paced driving down twisty mountain roads. One of the main 'strips' in Knoxville, Tennessee, had its beginning as a mecca for aspiring bootlegging drivers.