- A. H. Hand Papers, 1835/20091
- A. L. McLeod Papers, 1964/19661
- A. Willis Robertson Papers, 1921/1988, bulk 1946/19661
- Alumni Association Records, 1833/2014, bulk 1950/20051
- Alvin Duke Chandler Papers, 1896/1984, bulk 1950/19601
- American Association of University Professors, College of William and Mary Chapter Records, 1924/1979, bulk 1924/19791
- American Studies Program Records, 1960/20061
- Amos Koontz Papers I, 1809/1965, bulk 1936/19651
- Amos Koontz Papers II, 1865/19701
- Ann Buckles Papers, 1950/20081
- Anson Du Puy Van Buren letters, 1863/19971
- Archibald F. Ward, Jr. Papers, 1939/2007, bulk 1945/19601
- Armand J. Galfo Papers, 1940/2008, bulk 1958/19951
- Association for the Preservation of Virginia Antiquities, Colonial Capitol Branch Records, 1896/19891
- Association for the Preservation of Virginia Antiquities, Yorktown Branch Records, 1921/2013, bulk 1975/20051