- A. Patrick L. Prest, Jr. papers, 1941/201417
- A. Willis Robertson Papers, 1921/1988, bulk 1946/19662
- ALIVE (ALexandrians InVolved Ecumenically) Records (MS300), 1969/199522
- Abbye A. Gorin Architectural Collection, 1940/2006, bulk 1995/20063
- Abraham Anson papers, 1939/200528
- Abraham's Table manuscript, 1983/20121
- Academic Affairs: Academic Program Reviews, 1976/2018, bulk 1992/20182
- Adagio Press Collection, 1957/19935
- Adam Empie Papers, 1811/2004, bulk 1811/18502
- Admiral Thomas J. Lopez Papers, 1973/201420
- Admissions Office student recruitment materials, 1950/20191
- Adolphus DeBussey, Soldier, Civil War Letters, 1861/1998, bulk 1861/18711
- Advisory Committee Research Collection, 1772/201719
- Aerial Photographs of the Virginia Dept. of Transportation, 1930/20151
- African American Hugh Carr family, River View Farm, and the Papers of the Ivy Creek Foundation, 1916/19882