- 19th century newspaper illustrations collection, 1861/189410
- Abraham Anson papers, 1939/2005380
- Adams T. Rice papers, 1922/196038
- Agnes Wolf papers, 1966/2006288
- Alan Bowne papers, 1964/1991, bulk 1980/198950
- Alexander Golitzen film production collection4
- Alexander Haight family collection, 1764/1976151
- American Political Items Collectors collection97
- American Public Transportation Association records, 1898/19991,786
- American Theatre Association records2,838
- American voyage photograph albums, 1904/19392
- Amy Federman performing arts collection, 1963/20128
- Arden B. Schell Watergate collection776
- Arena Stage records, 1949/20108,297
- Armistead L. Boothe collection, 1920/198321