- Abbye A. Gorin Architectural Collection, 1940/2006, bulk 1995/20061
- Albert L. Sturm Papers, 1904/1988126
- Alberta Pfeiffer Architectural Collection, 1929/19763
- Alfred C. Payne Collection, 1917/200362
- Alice Langley Hsieh Papers,, 1943/19781
- Alleghany Chapter, National Society of the Daughters of the American Revolution Records,, 1890/202212
- American Egg Board Collection, 1974/20043
- American Work Horse Museum Collection,, 1971/19995
- Ann A. Hertzler Collection, 1863/2013, bulk 1974/20004
- Ann Eve Moss Papers, 1920/19905
- Anna P. Sokolina Architectural Collection, 1924/20193
- Anne H. Price Yates Papers, 1904/1985, bulk 1975/19853
- Anne Price Yates Papers II, 1898/20052
- Antoine Gaujot and Julien E. Gaujot Papers, 1840/19993
- Architectural League of New York: Archive of Women in Architecture Records, 1892/19763