- A. Willis Robertson Papers, 1921/1988, bulk 1946/19663
- A.J. Morrison Collection, 1754/19751
- ALIVE (ALexandrians InVolved Ecumenically) Records (MS300), 1969/19959
- Abbye A. Gorin Architectural Collection, 1940/2006, bulk 1995/20062
- Abraham Anson papers, 1939/200576
- Academic Departments - Record Group 91
- Ackerly Family Papers1
- Adagio Press Collection, 1957/19937
- Adalbert J. Volck Collection of Etchings, 1861/19794
- Adam Empie Papers, 1811/2004, bulk 1811/18503
- Addison H. Smith papers, 1917/1970, bulk 1917/19221
- Additional Louis J. Halle, Jr. Papers
1938-198716
- Adele Blow Chatfield-Taylor family papers, 1899/197722
- Adele Goodman Clark papers, 1849/19787
- Administration records collection, 1776/19762