- Acton
- Adelanto
- Agoura
- Agoura Hills
- Alamo
- Aliso Viejo
- Alondra Park
- Alpaugh
- Alpine Village
- Alpine
- Alpine Meadows
- Alpine Village
- Alta Sierra
- Altadena
- Alturas
- Alum Rock
- Amador City
- American Canyon
- Amesti
- Anaheim
- Anaheim Royal Mobile Home Park
- Angels Camp
- Angwin
- Antioch
- Aptos
- Arbuckle
- Arcadia
- Arcata
- Alameda Island
- Altamont