Napa Valley Orchid Society
- Includes newsletter archives, photo gallery and meeting information.
- http://www.napavalleyorchidsociety.org/

San Gabriel Valley Orchid Hobbyists, Inc.
- Features membership information, schedule of events and member photo gallery.
- http://www.sgvoh.org/

San Diego County Orchid Society
- Membership information, online newsletter, culture sheets, members' photo gallery and meeting schedule.
- http://www.sdorchids.com/

Sacramento Orchid Society
- Membership details, member photo section and show information.
- http://www.sacramentoorchids.org/

Orchid Society of Southern California
- Meeting monthly in Burbank, with members from across the greater Los Angeles metropolitan area, the OSSC is Southern California's oldest orchid society.
- http://www.orchidssc.org/

Orchid Society of California
- Features printable membership application, program information, calendar of events and cultural tips.
- http://www.orchidsocietyofcalifornia.com/

Orange County Orchid Society
- California society offers meeting details, archived newsletters, an events calendar and cultural information.
- http://www.ocos.net/

Malibu Orchid Society
- Meeting information, awards, society history and membership application available.
- http://www.malibuorchid.org/

Five Cities Orchid Society
- Located in Arroyo Grande. Information on the history of the society and upcoming events and show. Provides information on orchid culture, and care of orchids.
- http://www.fcos.org/

Diablo View Orchid Society
- Features meeting details and members' orchid pictures. Located near Walnut Creek.
- http://www.diabloviewos.org