- The Charles Edgar Butner Papers contain sketches and drawings from the architect's travels in California and Europe, newspaper clippings, photographs, ephemera, and a scrapbook on his service as an aviator in World War I and limited information on Butner's commissions in the San Joaquin Valley and Monterey Bay area in California.
- The Central Coast Farm Labor Organizing Collection contains materials relating to migrant farm workers on the Central Coast of California, including oral histories, reports, correspondence, strike ephemera, and secondary sources. Photographs taken by Manuel Echavarria documenting the United Farm Worker movement and used in the exhibit "iViva la Causa! A Decade of Farm Labor Organizing on the Central Coast" are included in the collection.
- The San Luis Obispo Regional Blueprints Collection contains architectural drawings, blueprints and specifications, discovered during the remodel of an old warehouse once belonging to the Southern Pacific Milling Company in San Luis Obispo, California. The bulk of the collection is made up of residential blueprints dating from 1938-1939 for houses located all over California’s Central Coast.