<Tr> <Th> GNIS feature ID </Th> <Td> 1251074 </Td> </Tr> <Tr> <Th> Website </Th> <Td> www.sumtersc.gov </Td> </Tr> <P> Sumter / ˈsʌmtər / 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 tri-county area of South Carolina, an area that includes the three counties in the east central Piedmont . The population was 39,643 at the 2000 census, and it rose to 40,524 at the 2010 census . </P> <P> 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 . </P>

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