Sumter County is a county located in the U.S. state of South Carolina. As of the 2020 census, the population was 105,556. Its county seat is Sumter. Located in the midlands of South Carolina, Sumter County is just east of the geographic heart of the state.
Poinsett State Park is located in Sumter County, South Carolina. The park is best known for its botanical oddities, combining flora from the foothills of the Blue Ridge Mountains, the Piedmont region of Upstate South Carolina, the xeric Sandhills, and the Atlantic coastal plain. Poinsett State Park contains mountain laurels draped with Spanish moss.