- Ann Buckles Papers, 1950/20085
- Ann Magnuson, Performance Artist, Papers, 1973/20241
- Anna P. Sokolina Architectural Collection, 1924/20192
- Anna Schein, Collector, Feedsack Textile Bag Collection, 1925/19651
- Anne Griswold Tyng Architectural Collection, 1969/19991
- Anne H. Cutler Papers, 1930/2013, bulk 1954/20006
- Anne Price Yates Papers II, 1898/20051
- Annual Reports (PB-02), 1935/20181
- Anthony-Seeger Campus School Records, 1956/19822
- Architectural League of New York: Archive of Women in Architecture Records, 1892/19762
- Arden B. Schell Watergate collection1
- Arden B. Schell Watergate collection, 1972/19741
- Arena Stage records, 1949/20108
- Armand J. Galfo Papers, 1940/2008, bulk 1958/19956
- Armistead Boothe Papers (MS164), 1803/19901