- Alexandria, Virginia City Records (MS019), 1750/1983, bulk 1825/18751
- Allen Family Papers, 1766/19332
- Ancella Bickley, Historian, Research Papers regarding African-Americans, 1775/2018, bulk 1970/20114
- Anderson Family papers, 1755/19583
- Andrew Lindamood papers, 1768/18172
- Ann Sparshall Commonplace Book, 1783/17922
- Anna Burton Ellett Collection, 1751/19326
- Anne Atkinson Chamberlayne Collection., 1742/19631
- Anthony Ware, Miscellaneous Papers, 1773/18861
- Archibald Stuart Ledgers, 1757/18521
- Archibald Woods Papers, 1777/1846, bulk 1783/18464
- Arithmetic Notebook, I, 1780/18201
- Armistead Papers, 1736/18971
- Armistead-Cocke Papers, 1680/19179
- Ashcraft Family Genealogy, 1732/19721