| | Alameda County | CA | 06001 | Oakland-Fremont-Berkeley,
CA 36084 | San
Francisco-Oakland-Fremont,
CA 41860 | San Jose-San
Francisco-Oakland, CA 488 | Central | metro county (urban) | 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 | metro county (urban) | 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 | metro county (urban) | recreation | https://maps.google.com/?q=MarinCounty+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 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 |