- Saint Andrew's Society of Washington, D.C. records, 1861/19951
- Samuel B. Finley Account Books, 1802/18592
- Samuel H. Yonge papers, 1890/19351
- Samuel Hanway Papers, 1782/18181
- Samuel Henley Letter to Mr. Johnson, 1775/18001
- Samuel Myers College Papers, 1808/18125
- Samuel Myers Papers, 1796/1845, bulk 1820/18371
- Samuel Price, Lawyer and Politician, Papers, 1788/18889
- Samuel Stanhope Smith Lectures, 1805/18111
- Samuel Vaughan Wilson Papers, 1945/20171
- Sarah C. Watts Papers, 1807/18096
- Saratoga County, New York, Ledger, 1806/18122
- Scott Family Papers, 1793/19132
- Scott and Gunnell family papers, 1772/19902
- Scottish Court of Session records, 1757/183427