- "Sawmilling in Carroll County, Virginia as Recalled by Ezra Martin" Typescript, 19821
- 1x1 Japan Exhibition Materials, 1965-2024, 20242
- A. E. Dick Howard papers, 1928/201729
- A. H. Hand Papers, 1835/20091
- A. Patrick L. Prest, Jr. papers, 1941/201421
- A. Willis Robertson Papers, 1921/1988, bulk 1946/19661
- ALIVE (ALexandrians InVolved Ecumenically) Records (MS300), 1969/199516
- Abbye A. Gorin Architectural Collection, 1940/2006, bulk 1995/20061
- Abraham Anson papers, 1939/200524
- Adagio Press Collection, 1957/19935
- Adam Empie Papers, 1811/2004, bulk 1811/18501
- Administrative Management Society records, 1941/1987, bulk 1941/19877
- Admiral Thomas J. Lopez Papers, 1973/20147
- Advisory Committee Research Collection, 1772/20178
- African American Hugh Carr family, River View Farm, and the Papers of the Ivy Creek Foundation, 1916/19883