- Abbye A. Gorin Architectural Collection, 1940/2006, bulk 1995/20061
- Albert L. Sturm Papers, 1904/198815
- Alberta Pfeiffer Architectural Collection, 1929/19761
- Alfred C. Payne Collection, 1917/200315
- Alleghany Chapter, National Society of the Daughters of the American Revolution Records, 1890/202211
- Ambrose L. Snavely Papers, 1903/19523
- Anne H. Price Yates Papers, 1904/1985, bulk 1975/19851
- Anne Price Yates Papers II, 1898/20051
- Antoine Gaujot and Julien E. Gaujot Papers, 1840/19994
- Appalachian Electric Power Company Photographs, 1931/19561
- Architectural League of New York: Archive of Women in Architecture Records, 1892/19762
- Arthur B. Massey Papers, 1902/19613
- Arthur M. Squires Papers, 1888/1987, bulk 1940/198760
- Arthur W. Grove Family Papers, 1900/19571
- Association for Women in Architecture Records, 1928/19923