Society for California Archaeology
- A nonprofit organization dedicated to research, understanding, interpretation and conservation of California's heritage. Members, newsletter, committees, events, and research.
- http://www.scahome.org/

Sons of the Revolution in the State of California
- Award-winning site featuring the American Revolution and Colonial History packed with history of the War of Independence. Complete with battle chronologies and statistics.
- http://www.srcalifornia.com/

Phil Sheridan Camp 4
- Part of the Sons of Union Veterans of the Civil War, serving the California counties of Santa Clara, San Mateo, and San Francisco.
- http://home.earthlink.net/~suvcw/sheridan4.html

California Council for the Promotion of History
- Organization to advance the preservation, interpretation, and management of California's historical resources, and to enhance the application of professional history skills. Activities and contact information.
- http://www.csus.edu/org/ccph/index.htm

California Historical Society
- Official historical association of the State of California.
- http://www.californiahistoricalsociety.org/

California Historical Societies
- Address information (including web site links) to historical societies in each county within the state of California.
- http://www.daddezio.com/society/hill/SH-CA-NDX.html