- Acampo
- Acton
- Adelaide
- Adelanto
- Adin
- Aerial Acres
- Agoura
- Agoura Hills
- Agua Dulce
- Aguanga
- Ahwahnee
- Alameda
- Alamo
- Albany
- Albion
- Alderpoint
- Alhambra
- Aliso Viejo
- Alleghany
- Alondra Park
- Alpaugh
- Alpine
- Alta
- Alta Loma
- Alta Sierra
- Altadena
- Altaville
- Alturas
- Alviso
- Amador City
- Amboy
- American Canyon
- Anaheim
- Anaheim Hills
- Anderson
- Angels Camp
- Angels City
- Angelus Oaks
- Angwin
- Annapolis
- Antelope
- Antioch
- Anza
- Apple Valley
- Applegate
- Aptos
- Arbuckle
- Arcadia
- Arcata
- Argus
- Arleta
- Armona
- Arnold
- Aromas
- Arrowbear Lake
- Arroyo Grande
- Artesia
- Artois
- Arvin
- Ashland
- Atascadero
- Atherton
- Atwater
- Atwood
- Auberry
- Auburn
- Avalon
- Avenal
- Avery
- Avila Beach
- Avocado Heights
- Azusa
