- 17th and 18th century British periodicals, 1600/18001
- A. E. Dick Howard papers, 1928/20171
- Administration records collection, 1776/19761
- 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), 1767/20081
- Ancella Bickley, Historian, Research Papers regarding African-Americans, 1775/2018, bulk 1970/20111
- Anderson Family papers, 1755/19582
- Andrew Lindamood papers, 1768/18171
- Anna Burton Ellett Collection, 1751/19322
- Armistead-Cocke Papers, 1680/19171
- Augusta County and Bath County, Virginia, Receipts,, 1780/18481
- Austin-Twyman Papers, 1765/19396