| | | Sutter County | CA | 06101 | | Yuba City, CA 49700 | Sacramento-Roseville, CA 472 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=SutterCounty+CA |
| | | Yuba County | CA | 06115 | | Yuba City, CA 49700 | Sacramento-Roseville, CA 472 | Central | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=YubaCounty+CA |
| | | Tulare County | CA | 06107 | | Visalia, CA 47300 | | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=TulareCounty+California |
| | | 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 |
| | | Mendocino County | CA | 06045 | | Ukiah, CA 46380 | | Central | nonmetro county (rural) | recreation | https://maps.google.com/?q=MendocinoCounty+CA |
| | | Nevada County | CA | 06057 | | Truckee-Grass Valley, CA 46020 | Sacramento-Roseville, CA 472 | Central | nonmetro county (rural) | recreation | https://maps.google.com/?q=NevadaCounty+CA |
| | | Lassen County | CA | 06035 | | Susanville, CA 45000 | | Central | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=LassenCounty+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 |
| | | Tuolumne County | CA | 06109 | | Sonora, CA 43760 | | Central | nonmetro county (rural) | recreation | https://maps.google.com/?q=TuolumneCounty+CA |
| | | Sonoma County | CA | 06097 | | Santa Rosa-Petaluma, CA 42220 | | Central | metro county (urban) | recreation | https://maps.google.com/?q=SonomaCounty+CA |
