- A. E. Dick Howard papers, 1928/20171
- Adams Papers, 1782/18901
- 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
- Allen Family Papers, 1766/19331
- Ancella Bickley, Historian, Research Papers regarding African-Americans, 1775/2018, bulk 1970/20111
- Anderson Family papers, 1755/19583
- Andrew Lindamood papers, 1768/18171
- Andrew Reid Account Book, 1787/18371
- Ann Sparshall Commonplace Book, 1783/17921
- Anna Burton Ellett Collection, 1751/19321