The Downey Historical Society is located at the Downey History Center in Apollo Park. For more than thirty years, the society's all-volunteer staff has been gathering and preserving records and artifacts from and about the southeastern part of Los Angeles County. The society's collection includes original photographs from 1870 to the present (copy negatives, duplicate prints, or 35-mm slides are…

The collection of the Duarte Historical Society and Friends of the Library focuses on the history of the City of Duarte and adjacent Bradbury. Its archive includes photographs, records, and other artifacts related to the settlers and families who developed Duarte, the local schools, and the local citrus industry..

The Baseball Reliquary maintains a large collection of artifacts, artworks, photographs, and documents related to baseball history in Southern California and the United States.

The Special Collections holdings reflect the diverse communities of the Claremont Colleges and the local area and region. Among the collections especially pertinent to Los Angeles and Southern California are the following:

The Drucker Institute, in cooperation with the Honnold/Mudd Library at the Claremont Colleges, maintains a collection of records donated by Peter Drucker and others with whom he interacted. The archives’ purpose is to support research related to Drucker’s life and work. The collection includes articles written by or about Peter Drucker, images and magnetic media, boxed awards and ephemera, and…

A digitized and hard copy JPEG, DOC, PDF, DVD collection of photo albums, oral history DVD's (approximately 50) from personal albums and interviews of valley residents including WWII veterans, policeman, fireman, actors, housewives, cowboys, farmers and business leaders from 1930s to present. Books and letters on the entertainment industry, history of the San Fernando Valley. 

The Topanga Historical Society (THS) was organized in 1974 by a group of dedicated community leaders who recognized the urgent need to collect and preserve records of Topanga’s unique history and to make them available to future generations. The Society maintains an Archive Center and presents quarterly local history programs.