- Adele Blow Chatfield-Taylor family papers, 1899/197721
- Adin B. Underwood Papers,, 1861/19261
- Administration records collection, 1776/19767
- Advisory Committee Research Collection, 1772/201711
- African American Family photograph album, 1910/19601
- African American Hugh Carr family, River View Farm, and the Papers of the Ivy Creek Foundation, 1916/19881
- African and African American photograph collection, 1850/19452
- African-American Tenant Farmer Photographs, Clarksville, Virginia, 1920/19301
- Albert C. Swindler Papers, 1862/1929, bulk 1862/18641
- Albert Frederick Wilson papers, 1840/19345
- Albert J. Wasserman Papers, 1925/20031
- Albert L. Sturm Papers, 1904/19882
- Albert Moore Reese, Zoology Professor, Miscellaneous Items, 1900/19706
- Albert R. Gallatin papers, 1795/18281
- Alderman family papers, 1779/19614