| | | Sierra County | CA | 06091 | | | | | nonmetro county (rural) | recreation | https://maps.google.com/?q=SierraCounty+CA |
| | | Siskiyou County | CA | 06093 | | | | | nonmetro county (rural) | nonspecialized | https://maps.google.com/?q=SiskiyouCounty+CA |
| | | Sonoma County | CA | 06097 | | Santa Rosa-Petaluma, CA 42220 | | Central | metro county (urban) | recreation | https://maps.google.com/?q=SonomaCounty+CA |
| | | Trinity County | CA | 06105 | | | | | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=TrinityCounty+CA |
| | | Tulare County | CA | 06107 | | Visalia, CA 47300 | | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=TulareCounty+California |
| | | Tuolumne County | CA | 06109 | | Sonora, CA 43760 | | Central | nonmetro county (rural) | recreation | https://maps.google.com/?q=TuolumneCounty+CA |
| | | Del Norte County | CA | 06015 | | Crescent City, CA 18860 | Brookings-Crescent City,
OR-CA 152 | Central | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=DelNorteCounty+CA |
| | | Fresno County | CA | 06019 | | Fresno, CA 23420 | Fresno-Hanford-Corcoran,
CA 260 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=FresnoCounty+CA |
| | | Kings County | CA | 06031 | | Hanford-Corcoran, CA 25260 | Fresno-Hanford-Corcoran,
CA 260 | Central | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=KingsCounty+CA |
| | | Madera County | CA | 06039 | | Fresno, CA 23420 | Fresno-Hanford-Corcoran,
CA 260 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=MaderaCounty+California |
