- Alvin Duke Chandler Papers, 1896/1984, bulk 1950/19601
- Amos Koontz Papers I, 1809/1965, bulk 1936/19651
- Amos Koontz Papers II, 1865/197026
- Anatole and Vladimir Kalichevsky Papers, 1871/19558
- Anderson Benskin Smith, Sr. Ledgers, 1916/1938, bulk 1916/19361
- Anna Lou Jose Papers, 1905-1936, 1964, 1905/19641
- Anne H. Cutler Papers, 1930/2013, bulk 1954/20001
- Anne T. Chapman Papers, 1884/19545
- Annie Baker Tucker's Colonial Ancestral Chart and Family Records, 1888/19191
- Anson Du Puy Van Buren letters, 1863/19971
- Appomattox Manor Music Collection, 1800/1940, bulk 1850/19101
- Armistead Family Papers, 1865/1946, bulk 1927/19293
- Armistead-Cocke Papers, 1680/19171
- Arthur George Williams Scrapbooks, 1905/19351
- Arthur Phillips Letters, 1917/19231