Sumter is a city in and the county seat of Sumter County, South Carolina, United States. Known as the Sumter Metropolitan Statistical Area, the namesake county adjoins Clarendon and Lee to form the core of Sumter-Lee-Clarendon tricounty area of South Carolina that includes three counties straddling the border of the Sandhills (or Midlands), Pee Dee, and Lowcountry regions. The population was 39,643 at the 2000 census, and it rose to 40,524 at the 2010 census.
Incorporated as Sumterville in 1845, the city's name was shortened to Sumter in 1855. It has grown and prospered from its early beginnings as a plantation settlement. The city and county of Sumter bear the name of General Thomas Sumter, the "Fighting Gamecock" of the American Revolutionary War.
During the Civil War, the town was an important supply and railroad repair center for the Confederacy. After the war, Sumter grew and prospered, using its large railroad network to supply cotton, timber, and by the start of the 20th century, tobacco to the region.
During the 20th century, Sumter grew into a major industrial center. Starting with the opening of Shaw Air Force Base (now home to the 9th Air Force, 20th Fighter Wing, and United States Army Central) in 1941, industry grew, especially after World War II. Sumter became increasingly known for textiles, manufacturing, biotech industries, a thriving retail environment, and medical center of its region in addition to agricultural products, which makes it a hub for business in the east-central portion of South Carolina.
Local sites listed on the National Register of Historic Places include:
Known as the Gamecock City, Sumter lies near the geographic center of the state of South Carolina at 33°55′37″N 80°21′49″W (33.926942, −80.363541). Sumter is 100 miles west of Myrtle Beach's Grand Strand and 175 miles east of the Blue Ridge Mountains. Columbia, the state capital, lies about 45 miles to the west, and Charleston is around 100 miles to the south.