- A. H. Hand Papers, 1835/20091
- A. J. Davis Family Collection, 1874/2007, bulk 1874/19071
- A. J. Gustin Priest papers, 1919/19761
- A. K. Leake Papers, 1872/19401
- A. Philip Randolph, Civil Rights and Labor Leader, Papers, 1919/19371
- A. Rufus Tonelson Papers, 1922/19751
- A. Willis Robertson Papers, 1921/1988, bulk 1946/19661
- A.B. Stickney, Compiler, Genealogical Materials, 1838/19591
- A.J. Morrison Collection, 1754/19751
- A.S. Hammack papers, 1864/19541
- Aaron Chipps, Coal Miner, Papers, 1912/19551
- Aaron Family Collection, 1908/19271
- Abraham Lincoln Collection, 1860/19651
- Abraham Lincoln Ephemera from England, 1909/19301
- Ada Haldeman Ford, Suffragist, Papers, 1900/19701