Public/Private Membership Organizations:

Anaheim Colony
http://www.anaheimhistoricalsociety.com/

Anaheim Historical Society
http://www.anaheimhistoricalsociety.com/

Buena Park Historical Society
http://www.historicalsociety.org/

Bungalow Heaven Neighborhood Association
www.bungalowheaven.org

California Preservation Foundation
http://www.californiapreservation.org/

Costa Mesa Historical Society
http://www.costamesahistory.org/

Dana Point Historical Society
http://www.danapointhistorical.org/

Floral Park Neighborhood Association
www.floral-park.com

Fullerton Heritage
http://www.fullertonheritage.org/

(The) Gamble House by Greene and Greene
www.gamblehouse.org

Huntington Beach Historical Society
http://hbnews.us/nwhouse.html

Irvine Historical Society
http://www.irvineranchhistory.com/

Laguna Beach Historical Society
http://www.lagunahistory.org/

National Trust for Historic Preservation
http://www.preservationnation.org/

Old House Journal
http://www.oldhousejournal.com/

Old Riverside Foundation for Historic Preservation
http://www.oldriverside.org

Orange County Historical Society
http://www.orangecountyhistory.org/

Orange Library History Room
http://www.cityoforange.org/localhistory/default.htm

Pasadena Heritage
www.pasadenaheritage.org

San Diego: Save Our Heritage Organisation
http://www.sohosandiego.org/

San Juan Capistrano Historical Society
http://www.sjchistoricalsociety.com/

Santa Ana Historical Preservation Society
http://www.santaanahistory.com

This Old House
http://www.thisoldhouse.com

Tustin Area Historical Society
http://www.tustinhistory.com/

Tustin Preservation Conservancy
http://preservetustin.org

Whittier Historic Neighborhood Association
http://www.whittierhistoric.org/

State and National Preservation

California Office of Historic Preservation
Information, training, publications, workshops, annual State Preservation Conference
http://www.ohp.parks.ca.gov/

California State Archives
http://minerva.sos.ca.gov/

National Register of Historic Places
The National Register is America's official list of cultural resources worthy of preservation. Learn more about historic preservation, preservation education, heritage tourism, and other topics related to historic places.
http://www.nationalregisterofhistoricplaces.com/