The Mid-Southern California Area has been allotted the responsibility of General Service support throughout the Area by the General Service Conference. In turn, the M.S.C.A. District structure has been approved by the Area Assembly to facilitate the accomplishment of this responsibility. The illustration below approximates the size and location of the Districts in the M.S.C.A. structure.
The Area is entirely covered by the Spanish-speaking Districts and also by the English-speaking Districts. Each District has assumed the responsibility for General Service support within the geographic boundaries of their District. Included are incorporated and unincorporated cities, towns and geographic locations. (All of these communities may not be shown in the lists of communities provided by the Districts for this atlas.) Spanish-speaking Districts support the Spanish-speaking Groups and English-speaking Districts support the English-speaking Groups. Groups with other languages are supported by the English-speaking District in which they are located.
Gardena, Hermosa Beach, Lawndale, Manhattan Beach, Palos Verdes, Estates, Rancho Palos Verdes, Redondo Beach, Rolling Hills, Rolling Hills Estates, Torrance
Artesia, Bellflower, Cerritos, Compton, Hawaiian Gardens, Lakewood (north of Carson), Long Beach (north of Carson), Norwalk, Paramount
Carson, Dominguez, Harbor City, Lomita, San Pedro, Wilmington
Avalon, Belmont Shore, Long Beach, Los Alamitos, Naples, Rossmoor
Cowan Heights, Lemon Heights, Orange, Orange Park, Santa Ana, Tustin, Villa Park
Balboa, Corona Del Mar, Fountain Valley, Huntington Beach, Newport Beach, Seal Beach, Sunset Beach
Garden Grove, Midway City, Stanton, Westminster
Corona, Mentone, Mira Loma, Moreno Valley, Norco, Redlands, Riverside, Rubidoux, Yucaipa
Bermuda Dunes, Blythe, Cathedral City, Coachella, Desert Center, Desert Hot Springs, Eagle Mountain, Indian Wells, Indio, La Quinta , North Palm Springs, Palm Desert, Palm Springs, Rancho Mirage, Whitewater
Anaheim (South of 91, West of 55), Buena Park, Cypress, Fullerton, La Palma
Big Bear, Bloomington, Blue Jay, Colton, Crestline, Fontana, Grand Terrace, Highland, Lake Arrowhead, Loma Linda, Rialto, Running Springs, San Bernardino
Aliso Viejo, Capistrano Beach, Dana Point , Laguna Beach, Laguna Hills, Laguna Woods, Laguna Niguel, Lake Forest, Mission Viejo, Mojeska Canyon, Rancho Santa Margarita, San Clemente, San Juan Capistrano, Silverado Canyon, South Laguna, Coto de Caza and Ladera Ranch.
Anza, Aquanga, Banning, Beaumont, Cabazon, Hemet, Homeland, Juniper Flats, Idyllwild, Romoland, San Jacinto, Winchester
Anaheim, Anaheim Hills, Brea, La Habra, Placentia, Yorba Linda
Canyon Lake, Lake Elsinore, Menifee, Murrieta, Perris, Sun City, Temecula, Wildomar
Adelanto, Apple Valley, Barstow, Hesperia, Lucerne Valley, Newberry Springs, Phelan, Trona, Victorville, Wrightwood, Yermo
Aliso Viejo, Balboa, Capistrano Beach, Corona del Mar, Costa Mesa, Dana Point, Fountain Valley, Huntington Beach, Irvine, Laguna Beach, Laguna Hills, Laguna Niguel, Laguna Woods, Lake Forest, Leisure World, Mission Viejo, Modjeska Canyon, Newport Beach, Rancho Santa Margarita, Santa Ana, San Clemente, San Juan Capistrano, Seal Beach, Silverado Canyon, South Laguna, Sunset Beach, Trabuco Canyon, Tustin
Artesia, Avalon, Bellflower, Carson, Cerritos, Dominquez, Gardena, Harbor City, Hawaiian Gardens, Hermosa Beach, Lakewood, Lawndale, Lomita, Long Beach, Los Alamitos, Manhattan Beach, Rancho Palos Verdes, Redondo Beach, Rolling Hills, Rolling Hills Estates, San Pedro, Signal Hill, Torrance, Wilmington, and portions of Compton, Norwalk, Paramount.
Bermuda Dunes, Cathedral City, Coachella, Desert Center, Desert Hot Springs, Eagle Mountain, Indian Wells, Indio, Joshua Tree, Landers, La Quinta, Mecca, Morongo Valley, Palm Desert, Palm Springs, Rancho Mirage, Thermal, Thousand Palms, Twentynine Palms, Yucca Valley
Anza, Bloomington, Bluejay, Cabazon, Canyon Lake, Corona, Grand Terrace, Hemet, Homeland, Idyllwild, Lake Elsinore, Loma Linda, Menifee, Mira Loma, Moreno Valley, Murrieta, Newberry Springs, Norco, Ontario, Perris, Rancho California, Riverside, Romoland, Rubidoux, San Jacinto, Sun City, Temecula, Wildomar.
Anaheim, Anaheim Hills, Brea, Buena Park, Cowan Heights, Cypress, Fullerton, Garden Grove, La Habra, La Palma, Lemon Heights, Midway City, Orange, Orange Park, Placentia, Stanton, Tustin, Villa Park, Westminster, Yorba Linda
Adelanto, Apple Valley, Banning, Barstow, Beaumont, Big Bear City, Big Bear Lake, Cherry Valley, Crestline, Colton, Dagget, Devore, El Cerrito, Fawnskin, Fontana, Forest Falls, Helendale, Hesperia, Highland, Hinkley, Lake Arrowhead, Lenwood, Lucerne Valley, Mentone, Muscoy, Phelan, Redlands, Rialto, Running Springs, San Bernardino, Trona, Victorville, Yermo, Yucaipa.
Joshua Tree, Landers, Morongo Valley, Twentynine Palms,
Wonder Valley, Yucca Valley
English 
Spanish