Your chapter is determined by the county in which you reside.
Chapter 502 Counties -
(North-Eastern CA)
Alpine
Butte
Colusa
El Dorado
Glenn
Lassen
Modoc
Nevada
Placer
Plumas
Shasta
Sierra
Siskiyou
Sutter
Tehama
Trinity
Yuba
Chapter 503 Counties -
(Sacramento Area)
Sacramento
Yolo
Chapter 504 Counties -
(North Western CA)
Del Norte
Humboldt
Lake
Marin
Mendocino
Napa
Solano
Sonoma
Chapter 505 Counties -
(Bay Area)
Alameda
Contra Costa
San Francisco
San Mateo
Chapter 507 Counties -
(Santa Clara and Monterey Area)
Monterey
San Benito
Santa Clara
Santa Cruz
Chapter 508 Counties -
(Central Valley and Sierras)
Amador
Calaveras
Inyo
Mariposa
Merced
Mono
San Joaquin
Stanislaus
Tuolumne
Chapter 509 Counties -
(Southern Central Valley)
Fresno
Kern
King
Madera
Tulare
Chapter 511 Counties -
(L.A.)
Los Angeles
Chapter 512 Counties -
(South Coast)
San Luis Obispo
Santa Barbara
Ventura
Chapter 513 Counties -
(San Diego Area)
Imperial
Orange
San Diego
Chapter 514 Counties -
(San Bernardino)
Riverside
San Bernardino