- 1748-18091
- A. E. Dick Howard papers, 1928/20171
- A. Willis Robertson Papers, 1921/1988, bulk 1946/19661
- Abraham Davenport Ledger, 1804/18331
- Adams Papers, 1782/18901
- Administration records collection, 1776/19762
- Advisory Committee Research Collection, 1772/20175
- Alderman family papers, 1779/19611
- Alexander Balmaine Memorandum Book, 1775/18201
- Alexander Haight family collection, 1764/19761
- Alexander Haight family collection, 1764/19771
- Alexandria History Collection (MS240), 1767/20087
- Alexandria Library Company Records (MS002), 1794/20074
- Allen Family Papers, 1766/19336
- Ancella Bickley, Historian, Research Papers regarding African-Americans, 1775/2018, bulk 1970/20114