- American Institute of Architects1
- American Institute of Architects. Women in Architecture1
- American Ironing Machine Co1
- American National Red Cross1
- American Public Transportation Association1
- Amherst, Jeffery Amherst, Baron, 1717-17971
- Amiss family1
- Amory, Thomas D. (Thomas Dwyer), 1893-19181
- Anderson Gallery1
- Anderson family1
- Anderson, Clinton Lee1
- Anderson, Eleanor Copenhaver, 1896-19851
- Anderson, Ellen Graham1
- Anderson, Estelle V.1
- Anderson, Joseph R., Jr. (Joseph Reid), 1851-19301