San Diego Mensa
- Includes the entirety of San Diego County.
- http://www.sandiego.us.mensa.org/

Sacramento Regional Mensa
- California
- http://sacramento.us.mensa.org

Monterey County Mensa
- Includes calendar of events and contacts for club officers.
- http://monterey.us.mensa.org/

Greater Los Angeles Area Mensa
- Includes calendar of events, information about special events, members' personal pages, and contacts for special interest groups.
- http://www.glaam.us.mensa.org/

San Francisco Regional Mensa
- Calendar of activities, links to members personal websites and information for members are a few of what might be found here.
- http://www.sfmensa.org/

Orange County Mensa
- Includes events calendar, scholarship information, and members-only newsletter.
- http://www.orange.us.mensa.org/