- A. K. Leake Papers, 1872/19402
- A. Philip Randolph, Civil Rights and Labor Leader, Papers, 1919/19371
- A. Rufus Tonelson Papers, 1922/19755
- A. S. Lara papers, 1856/18611
- A. Willis Robertson Papers, 1921/1988, bulk 1946/1966130
- A.B. Stickney, Compiler, Genealogical Materials, 1838/19591
- A.J. Morrison Collection, 1754/19751
- A.S. Hammack papers, 1864/19542
- Aaron Chipps, Coal Miner, Papers, 1912/19551
- Abbot E. Smith Papers, 1930/19394
- Abraham Anson papers, 1939/20052
- Abraham Johnson Family Genealogy, 1930/19391
- Abraham Lincoln Collection, 1860/19651
- Academic Departments - Record Group 99
- Ackerly Family Papers16