- A. Edwin Kendrew Papers, 1930/19591
- A. H. Hand Papers, 1835/20092
- A. Willis Robertson Papers, 1921/1988, bulk 1946/19661,192
- Adagio Press Collection, 1957/19932
- Adam Empie Papers, 1811/2004, bulk 1811/18503
- Adele Blow Chatfield-Taylor family papers, 1899/197723
- African American Family Photographs, 1880/19603
- African American Paratroopers Photo Album, 1957/19581
- Alan V. Briceland Papers, 1957/19613
- Albert E. Garrett, Jr. scrapbook, 1927/19741
- Albert E. Haak Scrapbook, 1947/19772
- Alberto Runge Neo-Nazi Collection, 1958/19651
- Alexander Kallos Papers, 1939/19592
- Alfred R. Armstrong Papers, 1928/19761
- Allen-Kean-Laurence family letters, 1837/19602