Dover Motorsports, Inc. (formerly Dover Downs Entertainment) is a company that owned several auto racing circuits in the United States. The company is based in Dover, Delaware, United States, the home of its flagship track Dover International Speedway, a 1 mile (1.6 km) concrete oval with a seating capacity of 95,500 that opened in 1969. The company formerly owned the Dover Downs harness racing track adjacent to the Dover speedway. Dover Motorsports formerly operated Nashville Superspeedway, a 1.333 mile concrete oval track in Lebanon, Tennessee, and Gateway International Raceway, a 1.25 mile egg-shaped asphalt oval track in Madison, Illinois, in addition to its flagship one-mile concrete oval track. Dover Motorsports owned Memphis Motorsports Park, a .75 mile tri-oval asphalt short track in Millington, Tennessee, but closed the track in October 2009 to competition and was sold to Palm Beach International Raceway after sitting unused for over a year.

In 2011, Dover Motorsports announced that it will not sanction NASCAR events at Gateway International Raceway, and Nashville Superspeedway will also no longer host NASCAR races starting in 2012.