| | | Alameda County | CA | 06001 | Oakland-Fremont-Berkeley,
CA 36084 | San
Francisco-Oakland-Fremont,
CA 41860 | San Jose-San
Francisco-Oakland, CA 488 | Central | in metro of > 1m | nonspecialized | https://maps.google.com/?q=AlamedaCounty+CA |
| | | Contra Costa County | CA | 06013 | Oakland-Fremont-Berkeley,
CA 36084 | San
Francisco-Oakland-Fremont,
CA 41860 | San Jose-San
Francisco-Oakland, CA 488 | Outlying | in metro of > 1m | nonspecialized | https://maps.google.com/?q=ContraCostaCounty+CA |
| | | Marin County | CA | 06041 | San Rafael, CA 42034 | San
Francisco-Oakland-Fremont,
CA 41860 | San Jose-San
Francisco-Oakland, CA 488 | Central | in metro of > 1m | recreation | https://maps.google.com/?q=MarinCounty+CA |
| | | Merced County | CA | 06047 | | Merced, CA 32900 | San Jose-San
Francisco-Oakland, CA 488 | Central | in metro of > 250k
< 1m | nonspecialized | https://maps.google.com/?q=MercedCounty+California |
| | | Napa County | CA | 06055 | | Napa, CA 34900 | San Jose-San
Francisco-Oakland, CA 488 | Central | in metro of < 250k | recreation | https://maps.google.com/?q=NapaCounty+CA |
| | | San Benito County | CA | 06069 | | San Jose-Sunnyvale-Santa
Clara, CA 41940 | San Jose-San
Francisco-Oakland, CA 488 | Outlying | in metro of > 1m | nonspecialized | https://maps.google.com/?q=SanBenitoCounty+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 | in metro of > 1m | 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 | in metro of > 250k
< 1m | nonspecialized | https://maps.google.com/?q=SanJoaquinCounty+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 | in metro of > 1m | nonspecialized | https://maps.google.com/?q=SanMateoCounty+CA |
| | | Santa Clara County | CA | 06085 | | San Jose-Sunnyvale-Santa
Clara, CA 41940 | San Jose-San
Francisco-Oakland, CA 488 | Central | in metro of > 1m | manufacturing-dependent | https://maps.google.com/?q=SantaClaraCounty+CA |
