| | San Diego County | CA | 06073 | | San Diego-Chula
Vista-Carlsbad, CA 41740 | | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=SanDiegoCounty+CA |
| | San Francisco County | CA | 06075 | San Francisco-San
Mateo-Redwood City, CA 41884 | San
Francisco-Oakland-Fremont,
CA 41860 | San Jose-San
Francisco-Oakland, CA 488 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=SanFranciscoCounty+CA |
| | San Joaquin County | CA | 06077 | | Stockton-Lodi, CA 44700 | San Jose-San
Francisco-Oakland, CA 488 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=SanJoaquinCounty+CA |
| | San Luis Obispo County | CA | 06079 | | San Luis Obispo-Paso
Robles, CA 42020 | | Central | metro county (urban) | recreation | https://maps.google.com/?q=SanLuisObispoCounty+CA |
| | San Mateo County | CA | 06081 | San Francisco-San
Mateo-Redwood City, CA 41884 | San
Francisco-Oakland-Fremont,
CA 41860 | San Jose-San
Francisco-Oakland, CA 488 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=SanMateoCounty+CA |
| | Santa Barbara County | CA | 06083 | | Santa Maria-Santa
Barbara, CA 42200 | | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=SantaBarbaraCounty+CA |
| | Santa Clara County | CA | 06085 | | San Jose-Sunnyvale-Santa
Clara, CA 41940 | San Jose-San
Francisco-Oakland, CA 488 | Central | metro county (urban) | manufacturing-dependent | https://maps.google.com/?q=SantaClaraCounty+CA |
| | Santa Cruz County | CA | 06087 | | Santa Cruz-Watsonville,
CA 42100 | San Jose-San
Francisco-Oakland, CA 488 | Central | metro county (urban) | recreation | https://maps.google.com/?q=SantaCruzCounty+CA |
| | Shasta County | CA | 06089 | | Redding, CA 39820 | Redding-Red Bluff, CA 454 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=ShastaCounty+CA |
| | Solano County | CA | 06095 | | Vallejo, CA 46700 | San Jose-San
Francisco-Oakland, CA 488 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=SolanoCounty+CA |