- American Studies Program Records, 1960/20062
- Amos Koontz Papers I, 1809/1965, bulk 1936/19651
- Amos Koontz Papers II, 1865/197039
- Ann Buckles Papers, 1950/200879
- Ann Little Papers, 1947/19672
- Anna Lou Jose Papers, 1905-1936, 1964, 1905/19641
- Anne H. Cutler Papers, 1930/2013, bulk 1954/200019
- Anne and Alan Morledge Collection, 1946/2005, bulk 1969/19881
- Anson Du Puy Van Buren letters, 1863/19971
- Anthony Esler Papers, 1962/19803
- Aquilla Matthews papers, 1925/19846
- Archibald F. Ward, Jr. Papers, 1939/2007, bulk 1945/19604
- Armand J. Galfo Papers, 1940/2008, bulk 1958/199518
- Arthur H. Snyder Papers, 1925/1972, bulk 1968/19721
- Arthur J. Winder Collection, 1962/19753