- A. J. Davis Family Collection, 1874/2007, bulk 1874/19079
- Adin B. Underwood Papers,, 1861/19263
- Alabama Great Southern Railroad Company Agreements, 1887/18904
- Alexander Farish Robertson Papers, 1867/19317
- Alexander McNutt Glasgow Family Papers, 1823/190315
- Alexander Von Humboldt Portrait Print, 1855/18901
- Ann A. Hertzler Collection, 1863/2013, bulk 1974/20002
- Anna Burton Ellett Collection, 1751/19321
- Antoine Gaujot and Julien E. Gaujot Papers, 1840/19992
- Archer Lawrie Sheet Music Collection, 1879/19351
- Arthur M. Squires Papers, 1888/1987, bulk 1940/19871
- Association for the Preservation of Virginia Antiquities, Montgomery County Branch Papers, 1754/1996, bulk 1958/19831
- August Dietz Civil War Collection,, 1862/19091
- Augustus Smith Family Collection, 1864/19262
- Ayre Family Collection, 1871/18991