California Neighborhoods O
- Oak Creek (19)
- Oak Grove (1)
- Oak Grove Manor (1)
- Oak Knoll (3)
- Oak Knoll Golf Links (1)
- Oak Knoll-Redwood Park (4)
- Oak Park (1)
- Oak Park (10)
- Oak Springs (1)
- Oak Valley Greens (1)
- Oak View (8)
- Oakmont (1)
- Oakmont Village (8)
- Oakridge (1)
- Ocean Beach (51)
- Ocean Crest (13)
- Ocean Hills (8)
- Ocean Park (69)
- Oceana (7)
- Oceanview (5)
- Ohlone (1)
- Oildale (3)
- Old Agoura (1)
- Old Davis North (1)
- Old East Davis (2)
- Old Lakewood City (2)
- Old Las Palmas (4)
- Old Los Altos (2)
- Old North Sacramento (10)
- Old Oakland (6)
- Old Palo Alto (2)
- Old Sacramento (6)
- Old San Leandro (12)
- Old Town (2)
- Old Town (21)
- Old Town Kern (6)
- Old Towne Orange (2)
- Old West Sacramento (2)
- Olde Torrance Neighborhood (17)
- Oleander/Sunset (28)
- Olive Drive (2)
- Olive Drive Area (5)
- Olive Heights (9)
- Olympia (3)
- Olympus Pointe (2)
- One Ford Road (2)
- Orange Heights (1)
- Orange Park (2)
- Orangecrest (2)
- Orchard Hills (30)
- Orchard Park (2)
- Ord Grove (2)
- Ortega Park (3)
- Otay Mesa (10)
- Otay Mesa West (6)
- Otay Ranch (55)
- Otay Ranch Village (8)
- Otay Town (5)
- Outer Arden-Arcade (127)
- Outer Campbell/Los Gatos (45)
- Outer Carmichael/Citrus Heights (64)
- Outer Ceres/Keyes (3)
- Outer Danville/San Ramon (50)
- Outer Davis (36)
- Outer East Bakersfield (55)
- Outer Elk Grove (39)
- Outer Folsom/Orangevale/Fair Oaks (37)
- Outer Lakeview (5)
- Outer Lompoc/Santa Ynez (3)
- Outer Mill Vly/Corte Madera/Sausalito (22)
- Outer Milpitas/Berryessa (21)
- Outer Mission (1)
- Outer Monterey (16)
- Outer Mountain View/Los Altos (130)
- Outer N Sac/Natomas/N Highlands (13)
- Outer Napa (6)
- Outer North San Jose (15)
- Outer NW Bakersfield (43)
- Outer Oxnard (3)
- Outer Palo Alto (1)
- Outer Rancho Cordova (54)
- Outer Richmond/Martinez (20)
- Outer Roseville/Rocklin (32)
- Outer San Jacinto (99)
- Outer San Rafael/Larkspur (8)
- Outer Santa Clara (120)
- Outer Santa Maria (4)
- Outer Santa Rosa (84)
- Outer Sunnyvale (19)
- Outer Sunset (11)
- Outer Thousand Oaks (100)
- Outer Walnut Creek (66)
- Outlying Palm Springs (220)
- Overfelt (1)
- Oxnard Dunes (1)
- Oxnard Shores (22)