| | | Alameda County | CA | 06001 | Oakland-Hayward-Berkeley,
CA 36084 | San
Francisco-Oakland-Hayward,
CA 41860 | San Jose-San
Francisco-Oakland, CA 488 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=AlamedaCounty+CA |
| | | Alpine County | CA | 06003 | | | | Non-metropolitan | nonmetro county (rural) | recreation | https://maps.google.com/?q=AlpineCounty+CA |
| | | Amador County | CA | 06005 | | | | Non-metropolitan | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=AmadorCounty+CA |
| | | Butte County | CA | 06007 | | Chico, CA 17020 | | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=ButteCounty+CA |
| | | Calaveras County | CA | 06009 | | | | Non-metropolitan | nonmetro county (rural) | recreation | https://maps.google.com/?q=CalaverasCounty+CA |
| | | Colusa County | CA | 06011 | | | | Non-metropolitan | nonmetro county (rural) | farm-dependent | https://maps.google.com/?q=ColusaCounty+CA |
| | | Contra Costa County | CA | 06013 | Oakland-Hayward-Berkeley,
CA 36084 | San
Francisco-Oakland-Hayward,
CA 41860 | San Jose-San
Francisco-Oakland, CA 488 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=ContraCostaCounty+CA |
| | | Del Norte County | CA | 06015 | | Crescent City, CA 18860 | | Central | nonmetro county (rural) | federal/state
government-dependent | https://maps.google.com/?q=DelNorteCounty+CA |
| | | El Dorado County | CA | 06017 | | Sacramento--Roseville--Arden-Arcade,
CA 40900 | Sacramento-Roseville, CA 472 | Central | metro county (urban) | recreation | https://maps.google.com/?q=ElDoradoCounty+CA |
| | | Fresno County | CA | 06019 | | Fresno, CA 23420 | Fresno-Madera, CA 260 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=FresnoCounty+CA |
