The National Association for Stock Car Auto Racing (NASCAR) is a family-owned and operated business venture that sanctions and governs multiple auto racing sports events; and was founded by Bill France Sr. in 1947-48. As of 2009, the CEO for the company is Brian France, grandson of the late Bill France Sr. NASCAR is the largest sanctioning body of stock car racing 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. NASCAR has presented exhibition races in Suzuka City, Japan, Motegi City, Japan, and Melbourne, Australia.

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, Bentonville, 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.

In October 2000, the Time Warner Company, Turner Sports Interactive, acquired all of NASCAR's interactive rights and the rights to the nascar.com domain. As of January 2001, Turner Sports Interactive is the exclusive producer, and NASCAR.com is the official site for NASCAR Inc. The NASCAR.COM staff is located in Atlanta, GA., with additional personnel in Charlotte, NC., and Daytona FL. The nascar.com domain is currently leased through Network Solutions, and extends through the year 2016.