- S.C. Democratic Party1
- Sanders, Arthur1
- Sanders, J.L.1
- Sloan, Eugene B., 1922-19691
- Smith, Derek1
- Smith, Janet Clayton1
- Smith, Simmie1
- South Carolina Negro Law Enforcement Officers Association1
- South Carolina State Library Board1
- South Carolina. State Board of Education1
- South Carolina. State Highway Department1
- Southern Regional Council. Voter Education Project1
- Sprott, Margaret1
- St. John, Diane1
- State of South Carolina. Sumter County.1
- Stoeber, E. M. (Cartographer)1
- Stubbs, J. A.1
- Sumter Agricultural Association1
- Sumter, Francis1
- Sumter, Thomas1