The Pleasant Hill Library has the following local history resources
- Historical newspapers
To locate newspapers for a specific Contra Costa community.
To locate branch holdings for a specific Contra Costa newspaper.
See the Library's Union List of Periodicals for a complete list of local newspaper holdings. - Newspaper indexes
San Francisco Chronicle Index (Microfilm: 1950-1980; Bound: 1972+ )
West County Times Index (Bound: 1988-1990)
Contra Costa County Local History Index (1959-1965): Indexes the Richmond Independent - Newspaper clipping files, primarily dating back to the 1960s.
- Maps of Contra Costa County as early as 1870.
- City directories dating back to 1914
- Business directories dating back to the 1940s.
- Telephone books dating back to 1955
Local Historical Societies
- Contra Costa County Historical Society
- California Genealogical
Society
Founded in 1898, this is the oldest genealogical society in California. The Society has a library of 38,000 genealogical resources. - Antioch Historical Society
- Los Californianos
Founded in 1968 by descendants of early Hispanic Californians, this society supports the research of Spanish and Mexican Alta California. - Clayton Historical Society
- Concord Historical Society
- Crockett Historical Society
- East Contra Costa Historical Society and Museum
- El Cerrito Historical Society
- Lafayette Historical Society
- Martinez Historical Society
- Moraga History Center
- Orinda Historical Society
- Pittsburg Historical Society
- Richmond Museum of History
- San Pablo Historical and Museum Society
- Walnut Creek Historical Society
Libraries and other resources
- The Bancroft Library
(University of California, Berkeley)
The Bancroft Library is one of the nation's largest libraries of rare books, manuscripts, pictorial and other special collections. The Bancroft Collection of Western Americana provides the documentary basis for understanding the settlement and development of California and the American West. - California State Library: Includes "Guide to Sources for Genealogy in the California History Room"
- California Newspaper Project: Online catalog of local newspapers in California libraries.
- Sutro Library
(California State Library)
