- Alexandria (Va.). Department of Planning and Urban Renewal1
- Alexandria (Va.). Office of City Engineer1
- Alexandria Library Association (1897-1937)1
- Alexandria Library Company1
- Alexandria Library Society (1937-1953)1
- Alfriend, Frank H., 1841-18871
- Allen family2
- Allen, Robert C. (Robert Clotworthy), 1834-18631
- Alley, Anderson1
- Alumni Band Organization.1
- Alwood, William Bradford, 1859-19461
- Ambler, Charles Henry, 1876-19573
- American Flint Glass Workers' Union, Local 10 (Moundsville, West Virginia)1
- Amherst, Jeffery Amherst, Baron, 1717-17971
- Amory, Thomas D. (Thomas Dwyer), 1893-19181