The Museum exhibits American Indian cultural materials, primarily focused on cultures of the Southwestern, Great Basin and Californian culture regions, which were connected by a major trade route from circa 4,000 BP. One of the largest collections is from the California coast and Channel Islands. Seven thousand artifacts are represented, ranging in age from 8-9,000 BP to ethnographic/historic…

Collections include pamphlets and ephemera documenting the growth, industries, transportation, and social organizations of Los Angeles and greater southern California; photograph collections; thousands of books related to southern California; and numerous archival collections related to indiviuals, the citrus industry, and businesses in the Inland Empire.