Darlington is a city in and the county seat of Darlington County, in the northeastern part of the U.S. state of South Carolina. It is a center for tobacco farming. The population was 6,720 at the 2000 census (12,066 total pop. of Darlington Urban Cluster) and is part of the Florence Metropolitan Statistical Area. It is the county seat of Darlington County. Darlington, theorized to be named for the Revolutionary War Colonel Darlington, is known for its Darlington Oak and Spanish moss. Darlington County was named thus by an Act in March of 1785. Darlington is best known for Darlington Raceway, a speedway that is home to an annual NASCAR Southern 500 race. Darlington is also the site of the National Motorsports Press Association (NMPA) Hall of Fame.