- S. A. Dunlop and Co. Ledger, 1887/18921
- S. B. Barham, Jr. Account Books, 19031
- S. G. Davis Ledger, 1860/18751
- S. George Company Records, 1900/19751
- S. H. Coffman & Co. Ledger and Commonplace Book, 1842/18441
- S. H. Coffman & Co. Ledger, 1831/18341
- S. P. Hite Company Daybook, 1905/19091
- Saint Andrew's Society of Washington, D.C. records, 1861/19951
- Salem School District, Board of Education, Record Books, 1888/19201
- Salt Sulphur Springs Records, 1819/19321
- Salt Sulphur Springs Records, 1825/18831
- Salt Sulphur Springs Records, 1894/19041
- Salvation Army Combined Corps Roll and Ledger, 1926/1980, bulk 1928/19691
- Samuel B. Finley Account Books, 1802/18591
- Samuel D. Morton and Co. Account Books, 1826/18911