Barrios de California A
- ABC (22)
- Adams (4)
- Adams Hill (7)
- Adams North (18)
- Adams Point (11)
- Adams Terrace (1)
- Adobe Meadows (3)
- Agate Bay Vista (3)
- Alamo Square (2)
- Albertstone-Beck (4)
- Alessandro (1)
- Alexian (3)
- Alkali Flat (6)
- Allendale (9)
- Allied Gardens (17)
- Alma-Almaden (1)
- Almaden (2)
- Almaden Valley (1)
- Almaden-Clare Felice (3)
- Almond Grove (1)
- Almonte (5)
- Alta Heights (5)
- Alta Mesa (5)
- Alta Vista (2)
- Alum Rock (1)
- Alviso (1)
- American River Canyon (1)
- Anaheim Hills (33)
- Anaheim Resort (19)
- Anatolia Village (6)
- Anderson West (6)
- Anza Vista (1)
- Applewood (1)
- Aquatic Park (1)
- Arden Park Vista (1)
- Ardenwood (10)
- Arlanza (14)
- Arlington (16)
- Arlington Farms/West Manor (4)
- Arlington Heights (1)
- Arlington Heights (54)
- Arlington South (5)
- Arrowhead (8)
- Arrowhead Farms (3)
- Arrowview (2)
- Arroyo Grande/Nipomo (11)
- Artcraft Manor (7)
- Artesia Pilar (1)
- Artic Sue (1)
- Artisan (1)
- Arts District (26)
- Ascot Drive Area (3)
- Ashbury Heights (1)
- Ashland (12)
- Assumption Parish (6)
- Atascadero/Templeton (14)
- Atwater Village (43)
- Auzerais-Josefa (4)
- Avalon (2)
- Avalon (2)
- Avila Beach/Los Osos (1)
- Avis-Cherry (2)
- Azalea-Hollywood Park (5)