- Santee Canal (S.C.)1
- Sprague, Charles J. (Charles James), 1823-19031
- St. John's, Berkeley County (S.C.)1
- Sullivant, William Starling, 1803-18731
- Torrey, John, 1796-18731
- Toumey, Michael, 1805-18571
- Venezuela1
- Weston, Plowden C. J. (Charles Jennett), 1820-18641
- Willey, Henry, 1824-19071