- Anderson, Robert Lane, 1907-19511
- Anderson, Sherwood (Sherwood Berton), 1876-19411
- Angle, L. C., Jr.1
- Antonakakis, Susana1
- Appalachian Student Organizing Committee. Virginia Tech Chapter1
- Architectural League of New York1
- Armistead, Mary Frances1
- Association for Women in Architecture (U.S.)1
- Association for the Preservation of Virginia Antiquities (APVA) (1889-2009)1
- Association of Collegiate Scholars in Architecture1
- Atkins, Georgia (Skinnell), 1886-19681
- Atkins, John G., 1884-19451
- Avery, Howard S. (Howard Shaeffer), 1906-19962
- Avitabile, James J.1
- Babcock, H. O.1