A
- Adelanto
- Agoura Hills
- Alameda
- Alamo
- Albany
- Alhambra
- Aliso Viejo
- Almaden Valley (Neighborhood)
- Alta
- Alturas
- Amador City
- American Canyon
- Anaheim
- Anaheim Hills (Neighborhood)
- Anderson
- Angels Camp
- Antelope
- Antioch
- Apple Valley
- Applegate
- Arcadia
- Arcata
- Arden-Arcade
- Arlington (Neighborhood)
- Arnold
- Arrowhead (Neighborhood)
- Arroyo Grande
- Artesia
- Arvin
- Atascadero
- Atherton
- Atwater
- Auburn
- Avalon
- Avenal
- Avila Beach
- Azusa
SitSignal