The institution has Special Collections including: 1) Local history; 2) American religious history; and 3) history of the American west. Under Local History, the Azusa-Foothill Citrus Collection consists of manuscripts, legal and business papers, financial journals and ledgers, photographs and maps dating back to 1844. The Sayre MacNeil Collection contains family papers and correspondences, and…

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.