- Abraham Anson papers, 1939/200526
- Adams T. Rice papers, 1922/19604
- Alexander Haight family collection, 1764/19765
- Alexander Haight family collection, 1764/19777
- American Political Items Collectors collection6
- American Political Items Collectors collection, 1895/19881
- American Public Transportation Association records, 1898/1999291
- American Theatre Association records2
- Arena Stage records, 1949/20102
- Armistead L. Boothe collection, 1920/19832
- Arnold Goldman Living Newspaper collection, 1931/197310
- Arnold Sundgaard papers, 1925/1988146
- Arthur E. Scott photograph collection63
- Arthur E. Scott photograph collection, 1910/197664
- Arthur Peterson papers2