South Sumter is a census-designated place in Sumter County, South Carolina, United States with a population of 3,365 as of the 2000 U.S. census. It is included in the Sumter, South Carolina Metropolitan Statistical Area. + South Sumter apartments for rent comparison page shows most up to date rent information on South Sumter apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.