| District
| Counties served
|
| First District | Alameda, Contra Costa, Del Norte, Humboldt, Lake, Marin, Mendocino, Napa, San Francisco, San Mateo, Solano, and Sonoma
|
| Second District | Los Angeles, Ventura, Santa Barbara and San Luis Obispo
|
| Third District | Alpine, Amador, Butte, Calaveras, Colusa, El Dorado, Glenn, Lassen, Modoc, Mono, Nevada, Placer, Plumas, Sacramento, San Joaquin, Shasta, Sierra, Siskiyou, Sutter, Tehama, Trinity, Yolo and Yuba
|
| Fourth District | Inyo, San Bernardino, Riverside, Orange, San Diego, and Imperial
|
| Fifth District | Fresno, Kern, Kings, Madera, Mariposa, Merced, Stanislaus, Tulare and Tuolumne
|
| Sixth District | Santa Clara, San Benito, Santa Cruz, and Monterey
|