- "Scenes from Behind the Wall: Images of East Germany, 1989/90" exhibit collection, 1989/20121
- A. E. Dick Howard papers, 1928/20172
- A. Patrick L. Prest, Jr. papers, 1941/20141
- Abraham Anson papers, 1939/20054
- Academic Affairs: Academic Program Reviews, 1976/2018, bulk 1992/20182
- Across the Way Productions, Inc.,
2002-20161
- Admiral Thomas J. Lopez Papers, 1973/20143
- Agnes Wolf papers, 1966/20061
- Alan Clarke Railroad Research Papers, 1861/20121
- Alexandria History Collection (MS240), 1767/20081
- Alexandria Library Board Records (MS416), 1937/20202
- Alexandria Library Company Records (MS002), 1794/20071
- Alexandria Library Records (MS098), 1937/20131
- Allan Blank Papers, 1958/20095
- Alleghany Chapter, National Society of the Daughters of the American Revolution Records,, 1890/20225