Barrios de California A
- ABC (22)
- Adams (6)
- Adams Hill (7)
- Adams North (13)
- Adams Point (11)
- Adobe Meadows (4)
- Agate Bay Vista (2)
- Alamo Square (5)
- Alessandro Heights (2)
- Alice (1)
- Alkali Flat (3)
- Allendale (9)
- Allied Arts (1)
- Allied Gardens (15)
- Alma-Almaden (4)
- Almaden Meadows (1)
- Almaden-Clare Felice (3)
- Almond Grove (1)
- Almonte (3)
- Alta Heights (1)
- Alta Mesa (11)
- Alta Vista (1)
- Alviso (2)
- Amberton (1)
- American River Canyon (1)
- Anaheim Hills (36)
- Anaheim Resort (19)
- Anatolia Village (5)
- Anderson East (2)
- Anderson West (4)
- Anne Darling (2)
- Araby Cove (1)
- Arden Park Vista (1)
- Ardenwood (8)
- Arlanza (14)
- Arlene Gardens (1)
- Arlington (5)
- Arlington Farms/West Manor (6)
- Arlington Heights (39)
- Arlington South (4)
- Arrowhead (1)
- Arrowhead (6)
- Arrowhead Farms (2)
- Arrowview (2)
- Arroyo Grande/Nipomo (9)
- Artcraft Manor (9)
- Artesia Pilar (3)
- Artisan (1)
- Arts District (17)
- Ascot Drive Area (3)
- Ashland (12)
- Assumption Parish (7)
- Atascadero/Templeton (17)
- Atwater Village (28)
- Auzerais-Josefa (2)
- Avalon (3)
- Avalon (3)
- Avila Beach/Los Osos (3)
- Avis-Cherry (2)
- Azalea-Hollywood Park (2)