- A. Quincy Jones Papers, 1942-197923
- AIDS Posters Collection1,432
- AIIS Center for Art & Archaeology Negatives & Slides2,974
- Adams (Peggy Hamilton) Papers542
- Adelbert Bartlett Papers, 1922-19506,479
- Africa Collections195
- Albanian Photographic and Graphic Art Collection18,031
- Aldous and Laura Huxley Papers, 1925-2007122
- Alexander Klemin Papers, 1900-19502
- Allan (Maud) Papers. Collection 20385
- Allied Architects Association of Los Angeles Records3
- Ammen (Daniel) Papers, 1836-18982
- Andrew Hamilton Papers, 1940-197413
- Arab Image Foundation Photo Negatives2,243
- Arai Family Papers, 1877-197224
- Archive of Confederación Campesina del Perú (CCP)89
- Archivo Histórico de Tijuana210
- Arkatov (James) World Music Photographs185
- Arkatov (James) collection778
- Armenia Collections616