- Arai Family Papers, 1877-197224
- Archive Fundation Q127
- Archive of Confederación Campesina del Perú (CCP)1
- Archive of Sound and Vision, Institute of African Studies, University of Ibadan3,092
- Archive of the Human Rights Office of the Archdiocese of Guatemala362
- Archivo Histórico de Tijuana210
- Arkatov (James) World Music Photographs185
- Arkatov (James) collection787
- Armenia Collections616
- Armenian Manuscripts63
- Arthur B. Spingarn Papers, ca. 1900-19711
- Aymara Language and Culture Audio-Visual Archive (Bolivia)951
- Bake/Jairazbhoy Digital Archive of South Asian Traditional Music and Arts1,574
- Barbados Ephemera Collection1,034
- Bennett (Walter E.) Photographic Collection, 1937-1983 (bulk 1952-1982)78
- Bound Manuscripts Collection16
- Broadside Ballads from England, Ireland, and the United States.5
- Brown (Bob) Papers22
- Buddhist Churches of America Records139
- Bunche (Ralph J.) Papers93