California Neighborhoods O
- Oak Creek (21)
- Oak Grove (2)
- Oak Grove Manor (1)
- Oak Knoll (1)
- Oak Knoll-Redwood Park (6)
- Oak Park (1)
- Oak Park (10)
- Oak Valley Greens (3)
- Oak View (8)
- Oakmont (1)
- Oakmont Village (9)
- Oakridge (2)
- Ocean Beach (44)
- Ocean Crest (12)
- Ocean Hills (8)
- Ocean Park (70)
- Oceana (9)
- Oceanview (6)
- Ohlone (1)
- Oildale (3)
- Old Agoura (2)
- Old Davis North (1)
- Old East Davis (3)
- Old Las Palmas (4)
- Old Los Altos (2)
- Old North Sacramento (6)
- Old Oakland (4)
- Old Palo Alto (2)
- Old Sacramento (3)
- Old San Leandro (12)
- Old Town (12)
- Old Town (4)
- Old Town Kern (5)
- Old Towne Orange (2)
- Old West Sacramento (3)
- Olde Torrance Neighborhood (19)
- Oleander/Sunset (24)
- Olive Drive (2)
- Olive Drive Area (4)
- Olive Heights (8)
- Olivenhain (1)
- Olympia (4)
- Olympus Pointe (1)
- One Ford Road (2)
- Orange Park (1)
- Orangecrest (6)
- Orchard Hills (35)
- Orchard Park (2)
- Ord Grove (2)
- Ortega Park (1)
- Otay Mesa (10)
- Otay Mesa West (7)
- Otay Ranch (57)
- Otay Ranch Village (11)
- Otay Town (6)
- Outer Arden-Arcade (126)
- Outer Campbell/Los Gatos (27)
- Outer Carmichael/Citrus Heights (65)
- Outer Ceres/Keyes (4)
- Outer Danville/San Ramon (70)
- Outer Davis (38)
- Outer East Bakersfield (30)
- Outer Elk Grove (38)
- Outer Folsom/Orangevale/Fair Oaks (34)
- Outer Lakeview (8)
- Outer Lompoc/Santa Ynez (4)
- Outer Mill Vly/Corte Madera/Sausalito (18)
- Outer Milpitas/Berryessa (19)
- Outer Mission (1)
- Outer Monterey (12)
- Outer Mountain View/Los Altos (91)
- Outer N Sac/Natomas/N Highlands (11)
- Outer Napa (11)
- Outer North San Jose (14)
- Outer NW Bakersfield (27)
- Outer Oxnard (5)
- Outer Palo Alto (1)
- Outer Rancho Cordova (49)
- Outer Richmond/Martinez (23)
- Outer Roseville/Rocklin (29)
- Outer San Jacinto (92)
- Outer San Rafael/Larkspur (9)
- Outer Santa Clara (129)
- Outer Santa Maria (2)
- Outer Santa Rosa (80)
- Outer Sunnyvale (20)
- Outer Sunset (6)
- Outer Thousand Oaks (98)
- Outer Walnut Creek (33)
- Outlying Palm Springs (240)
- Overfelt (1)
- Oxnard Dunes (2)
- Oxnard Shores (18)