- Ancella Bickley, Historian, Research Papers regarding African-Americans, 1775/2018, bulk 1970/20114
- Anderson Family papers, 1755/19582
- Andrew Lindamood papers, 1768/18172
- Anna Burton Ellett Collection, 1751/19325
- Anne Atkinson Chamberlayne Collection., 1742/19631
- Anthony Ware, Miscellaneous Papers, 1773/18861
- Archibald Stuart Ledgers, 1757/18521
- Armistead Papers, 1736/18971
- Armistead-Cocke Papers, 1680/19178
- Ashcraft Family Genealogy, 1732/19721
- Association for the Preservation of Virginia Antiquities, Montgomery County Branch Papers, 1754/1996, bulk 1958/19832
- Aurora, Preston County Papers, 1754/19001
- Austin-Twyman Papers, 1765/193914
- Baer Family Papers, 1744/19291
- Baird Family Papers, 1656/1922, bulk 1656/18481