- A. Jane Duncombe Architectural Papers, 1952/20023
- A. Patrick L. Prest, Jr. papers, 1941/201429
- A. Rufus Tonelson Papers, 1922/19751
- A. Willis Robertson Papers, 1921/1988, bulk 1946/19663
- ALIVE (ALexandrians InVolved Ecumenically) Records (MS300), 1969/19959
- Abbye A. Gorin Architectural Collection, 1940/2006, bulk 1995/20062
- Abraham Anson papers, 1939/200524
- Academic Affairs: Academic Program Reviews, 1976/2018, bulk 1992/20182
- Academic Departments - Record Group 91
- Ackerly Family Papers2
- Adagio Press Collection, 1957/19936
- 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
1938-198712