- A Calendar of The Jefferson Papers of the University of Virginia35
- A Map of the Country Between Albemarle Sound and Lake Erie, Comprehending the Whole of Virginia, Maryland, Delaware, and Pennsylvania., 17871
- A. E. Dick Howard papers, 1928/20171
- A.J. Morrison Collection, 1754/19751
- Account Books, 1782/18952
- Adams Papers, 1782/18902
- Administration records collection, 1776/19762
- Alderman family papers, 1779/19612
- Alex Welch Survey Papers, 1786/18011
- Alexander Balmaine Memorandum Book, 1775/18202
- Alexander Brown Papers (II), 1748/19001
- Alexander Haight family collection, 1764/19763
- Alexander Haight family collection, 1764/19773
- Alexander, Fultz, and Willson Families Collection, 1770/19701
- Alexandria History Collection (MS240), 1767/200810