- 17th and 18th century British periodicals, 1600/18001
- A Calendar of The Jefferson Papers of the University of Virginia1
- A. E. Dick Howard papers, 1928/20171
- A.J. Morrison Collection, 1754/19751
- Alexander Brown Papers (II), 1748/19002
- Alexandria History Collection (MS240), 1767/20081
- Alexandria, Virginia City Records (MS019), 1750/1983, bulk 1825/18751
- Anna Burton Ellett Collection, 1751/19325
- Anne Atkinson Chamberlayne Collection., 1742/19631
- Armistead Papers, 1736/18971
- Armistead-Cocke Papers, 1680/19172
- Ashcraft Family Genealogy, 1732/19721
- Association for the Preservation of Virginia Antiquities, Montgomery County Branch Papers, 1754/1996, bulk 1958/19833
- Aurora, Preston County Papers, 1754/19001
- Austin-Twyman Papers, 1765/19392