Region X comprises the following chapters:

086 Central Arizona - Phoenix, AZ 082 Golden Gate - San Francisco, CA 082 Golden Gate - Redwood Empire Section - Napa, CA 108 Hawaii - Honolulu, HI 126 Northern Nevada - Reno, NV 105 Orange Empire - Anaheim, CA 081 Sacramento Valley Sacramento, CA 085 San Diego - San Diego, CA 083 San Joaquin - Fresno, CA

101 San Jose - San Jose, CA 144 Sierra Delta - Stockton, CA 084 Southern California - Los Angeles, CA 084 Southern California - Western Section - Santa Barbara, CA 092 Southern Nevada - Las Vegas, NV 155 Tri-County - Redlands, CA 087 Tucson - Tucson, AZ