The California State Plane Zones represent the 6 zones of the State Plane Coordinate System (NAD1983) for California. The constituent counties of each zone are listed below.
| State Plane Zone | Counties |
| Zone 1 | Del Norte, Humboldt, Lassen, Modoc, Plumas, Shasta, Siskiyou, Tehama, Trinity |
| Zone 2 | Alpine, Amador, Butte, Colusa, El Dorado, Glenn, Lake, Mendocino, Napa, Nevada, Placer, Sacramento, Sierra, Solano, Sonoma, Sutter, Yolo, Yuba |
| Zone 3 | Alameda, Calaveras, Contra Costa, Madera, Marin, Mariposa, Merced, Mono, San Francisco, San Joaquin, San Mateo, Santa Clara, Santa Cruz, Stanislaus, Tuolumne |
| Zone 4 | Fresno, Inyo, Kings, Monterey, San Benito, Tulare |
| Zone 5 | Kern, Los Angeles, San Bernardino, San Luis Obispo, Santa Barbara, Ventura |
| Zone 6 | Imperial, Orange, Riverside, San Diego |