- Alexander Haight family collection, 1764/19761
- Alexander Haight family collection, 1764/19771
- Alexandria History Collection (MS240), 1767/20086
- Allen Family Papers, 1766/19331
- Ancella Bickley, Historian, Research Papers regarding African-Americans, 1775/2018, bulk 1970/20111
- Anna Burton Ellett Collection, 1751/19322
- Armistead-Cocke Papers, 1680/19172
- Association for the Preservation of Virginia Antiquities, Montgomery County Branch Papers, 1754/1996, bulk 1958/19831
- Austin-Twyman Papers, 1765/19392
- Barron Family Papers, 1793/19421
- Barry S. Martin collection of historical manuscripts and documents, 1771/18302
- Blow Family Papers, 1613/1960, bulk 1770/18751
- Board of Visitors records, 1757/20232
- Borland Family Papers, 1771/19401
- Brown, Coalter, Tucker Papers (I), 1790/19291