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Speedway Motorsports, LLC is an American company that owns and manages auto racing facilities that host races sanctioned by NASCAR, IndyCar Series, NHRA, World of Outlaws and other racing series. The company's headquarters are located at Charlotte Motor Speedway, just north of Charlotte, NC in Concord, NC. Speedway Motorsports owns nine racing facilities with a combined seating capacity of approximately 885,000. In addition to operating racetracks, Speedway Motorsports owns Performance Racing Network (PRN), U.S. Legends Cars International, and co-owns Motorsports Authentics.

After trading for 25 years on the New York Stock Exchange, where it was known as Speedway Motorsports, Inc. (SMI), the company was taken private in September 2019, and today is a wholly owned subsidiary of Sonic Financial Corporation, itself owned by Speedway Motorsports founder Bruton Smith and members of his family.