California Neighborhoods O
- Oak Creek (16)
- Oak Grove (4)
- Oak Knoll Golf Links (1)
- Oak Knoll-Redwood Park (6)
- Oak Park (1)
- Oak Park (10)
- Oak Park (14)
- Oak Springs (2)
- Oak Valley Greens (3)
- Oak View (4)
- Oakmont Village (7)
- Oakridge (1)
- Ocean Beach (31)
- Ocean Crest (17)
- Ocean Hills (5)
- Ocean Park (67)
- Oceana (6)
- Oceanview (1)
- Ohlone (1)
- Oildale (1)
- Old Agoura (3)
- Old East Davis (1)
- Old Lakewood City (1)
- Old Las Palmas (3)
- Old Los Altos (1)
- Old North Sacramento (8)
- Old Oakland (5)
- Old Port (1)
- Old Sacramento (7)
- Old San Leandro (13)
- Old Town (11)
- Old Town (3)
- Old West Sacramento (4)
- Olde Torrance Neighborhood (24)
- Oleander/Sunset (16)
- Olive Drive (2)
- Olive Drive Area (3)
- Olive Heights (3)
- Olympia (2)
- Olympus Pointe (2)
- One Ford Road (3)
- Ontario (135)
- Orange (80)
- Orange Heights (4)
- Orange Park (1)
- Orangecrest (7)
- Orchard Hills (27)
- Orchard Park (1)
- Ord Grove (1)
- Ortega Park (3)
- Oster (3)
- Otay Mesa (9)
- Otay Mesa West (11)
- Otay Ranch (59)
- Otay Ranch Village (8)
- Otay Town (5)
- Outer Arden-Arcade (93)
- Outer Campbell/Los Gatos (69)
- Outer Carmichael/Citrus Heights (68)
- Outer Ceres/Keyes (4)
- Outer Danville/San Ramon (69)
- Outer Davis (23)
- Outer East Bakersfield (40)
- Outer Elk Grove (34)
- Outer Folsom/Orangevale/Fair Oaks (39)
- Outer Lakeview (7)
- Outer Lompoc/Santa Ynez (3)
- Outer Mill Vly/Corte Madera/Sausalito (18)
- Outer Milpitas/Berryessa (26)
- Outer Mission (5)
- Outer Monterey (15)
- Outer Mountain View/Los Altos (146)
- Outer N Sac/Natomas/N Highlands (8)
- Outer Napa (11)
- Outer North San Jose (16)
- Outer NW Bakersfield (39)
- Outer Oxnard (4)
- Outer Rancho Cordova (62)
- Outer Richmond/Martinez (29)
- Outer Roseville/Rocklin (39)
- Outer San Jacinto (117)
- Outer San Rafael/Larkspur (10)
- Outer Santa Clara (120)
- Outer Santa Maria (4)
- Outer Santa Rosa (81)
- Outer Sunnyvale (17)
- Outer Sunset (14)
- Outer Thousand Oaks (96)
- Outer Walnut Creek (124)
- Outlying Palm Springs (201)
- Overfelt (1)
- Oxnard Dunes (3)
- Oxnard Shores (32)