- Abraham Anson papers, 1939/200558
- Agnes Wolf papers, 1966/20067
- Alan Bowne papers, 1964/1991, bulk 1980/19894
- Alexander Haight family collection, 1764/19764
- Alexander Haight family collection, 1764/19777
- American Political Items Collectors collection10
- American Political Items Collectors collection, 1895/19881
- American Public Transportation Association records, 1898/1999328
- American Public Transportation Association records, 1950/19801
- American Theatre Association records37
- Amy Federman performing arts collection, 1963/20124
- Arden B. Schell Watergate collection6
- Arden B. Schell Watergate collection, 1972/19746
- Arena Stage records, 1949/2010808
- Armistead L. Boothe collection, 1920/198316