- Additional Papers of the Randolph Family of Edgehill
1784-1910 (1975)1
- Admiral John Randolph Tucker Papers, 1865/18971
- Alexander Haight family collection, 1764/19761
- Alexander Haight family collection, 1764/19772
- Alexandria History Collection (MS240), 1767/200812
- Alexandria Library Company Records (MS002), 1794/20074
- Allen Family Papers, 1766/19331
- Alvan Fisher Personal Papers (SC-33), 1822/18521
- Ancella Bickley, Historian, Research Papers regarding African-Americans, 1775/2018, bulk 1970/20111
- Anna Burton Ellett Collection, 1751/19321
- Anna Maria Hickman Otis Mead Chalmers family papers, 1821/18971
- Armistead-Cocke Papers, 1680/19172
- Association for the Preservation of Virginia Antiquities, Montgomery County Branch Papers, 1754/1996, bulk 1958/19831
- Austin-Twyman Papers, 1765/19393
- Barker-Cooke Papers, 1809/1889, bulk 1848/18661