Hsitorical Society focused on history and peoples of Boyle Heights

The California State Library, comprising sections including California History, Information Services, Government Publications, and the Witkin Law Library in Sacramento and the Sutro Library in San Francisco, holds a wide variety of materials relating to the history of Los Angeles, including manuscripts, rare books, maps, photographs and other visual resources, ephemera, vertical files, and more. …

The Go For Broke National Education Center holds more than 1,150 life history interviews of Americans of Japanese ancestry who served in the United States Army in WWII. Many of the veterans interviewed were born and raised in Los Angeles and the surrounding area.

Documents and photos relating to the history of the Crescenta Valley. The La Crescenta Valley Historical Society has a lot of materials on the New Years Flood of 1934, and the town of Montrose, plus some materials on the American portrait artist S. Seymour Thomas.