Region Map
Region 1
Del Norte
Humboldt
Lake
Mendocino
Sonoma
Trinity
Region 2
Butte
Colusa
Glenn
Lassen
Modoc
Plumas
Shasta
Siskiyou
Tehama
Region 3
Alameda
Contra Costa
Marin
Napa
Solano
Region 4
Alpine
Amador
Calaveras
El Dorado
Mono
Nevada
Placer
Sacramento
San Joaquin
Sierra
Stanislaus
Sutter
Tuolumne
Yolo
Yuba
Region 5
Monterey
San Benito
San Francisco
San Mateo
Santa Clara
Santa Cruz
Region 6
Fresno
Madera
Mariposa
Merced
Region 7
Inyo
Kern
Kings
Tulare
Region 8
San Luis Obispo
Santa Barbara
Ventura
Region 9
Los Angeles
Region 10
Riverside
San Bernardino
Region 11
Orange
Region 12
Imperial
San Diego