The materials of the Regional History Collection document 100 years of Southern California history in various formats. The collection was founded in the mid-1970s as a repository for the papers of Southern Californian political figures, among them Governor Jerry Brown Jr., Congresswoman Yvonne Brathwaite Burke; and Congressmen Alphonso Bell, Chet Holifield, Craig Hosmer, and Gordon McDonough.

The Yosemite Archives contain historical records and manuscripts related to Yosemite's history, including the donated papers of ethnographers and scientists, resource management records, historic park administrative records, and slide, photo, and film collections.