List of places in California (O)

This list of current:

• cities
• towns, unincorporated communities
• counties, and other recognized places in the U.S. state of California.

Information on the number and names of counties in which the place lies, and its lower and upper ZIP code bounds, if applicable are also included.

---

Name of place	Number of counties	Principal county	Lower zip code	Upper zip code
Oak Bottom	1	Shasta County	96095
Oakdale	1	Stanislaus County	95361
Oak Glen	1	Humboldt County
Oak Glen	1	San Bernardino County	92399
Oak Grove	1	Butte County	95965
Oak Grove	1	San Diego County	92536
Oak Grove	1	Santa Clara County
Oak Grove	1	Tulare County
Oak Hills	1	Monterey County	92345
Oak Hills	1	San Bernardino County	92345
Oakhurst	1	Madera County	93644
Oak Knoll	1	Los Angeles County
Oak Knoll	1	Napa County
Oak Knoll Hills	1	Santa Clara County	95014
Oak Knolls	1	Santa Barbara County	93455
Oakland	1	Alameda County	94601	62
Oakland Army Base	1	Alameda County	94626
Oakland Naval Regional Medical Center	1	Alameda County	94627
Oakland Naval Supply Center	1	Alameda County	94625
Oakland Recreational Camp	1	Tuolumne County	95321
Oakley	1	Contra Costa County	94561
Oakmont	1	Sonoma County
Oak Park	1	Sacramento County	95817
Oak Park	1	San Luis Obispo County	93446
Oak Park	1	Ventura County
Oakridge	1	San Joaquin County
Oak Run	1	Shasta County	96069
Oaks	1	San Luis Obispo County	93420
Oak Valley	1	Ventura County	91301
Oak View	1	Ventura County	93022
Oak Village	1	Ventura County
Oakville	1	Napa County	94562
Oakwood	1	Los Angeles County	90004
Oasis	1	Riverside County	92274
Oban	1	Los Angeles County
Obie	1	Shasta County
Obie Junction	1	Siskiyou County
Obregon	1	Imperial County
O'Brien	1	Shasta County	96070
Occidental	1	Sonoma County	95465
Ocean Beach	1	San Diego County	92107
Oceano	1	San Luis Obispo County	93445
Ocean Park	1	Los Angeles County	90405
Oceanside	1	San Diego County	92049	58
Ocean View	1	Los Angeles County
Ocean View	1	Orange County
Ocean View	1	San Francisco County
Ocean View	1	Sonoma County	94923
Ockenden	1	Fresno County
Ocotillo	1	Imperial County	92259
Ocotillo Wells	1	San Diego County	92004
Octol	1	Tulare County
Ogilby	1	Imperial County
Oil City	1	Kern County
Oildale	1	Kern County	93308
Ojai	1	Ventura County	93023
Ojala	1	Ventura County
Olancha	1	Inyo County	93549
Olcott	1	Solano County
Old Adobe	1	San Luis Obispo County
Old Bretz Mill	1	Fresno County
Old Dale	1	San Bernardino County
Old Forbestown	1	Butte County
Old Fort Jim	1	El Dorado County	95667
Old Fort Tejon	1	Kern County
Old Gilroy	1	Santa Clara County	95020
Old Hilltown	1	Monterey County
Old Hopland	1	Mendocino County	95449
Old Mammoth	1	Mono County	93546
Old Pino	1	El Dorado County
Old Point Comfort	1	Los Angeles County
Old River	1	Kern County	93305
Old San Diego	1	San Diego County	92110
Old Station	1	Shasta County	96071
Old Town	1	Santa Barbara County
Old Towne	1	Kern County	93561
Old Town San Diego	1	San Diego County	92110
Oleander	1	Fresno County	93706
Olema	1	Marin County	94950
Oleo	1	Orange County
Oleum	1	Contra Costa County
Olga	1	Los Angeles County
Olinda	1	Orange County	92821
Olinda	1	Shasta County	96007
Olive	1	Orange County	92865
Olive Hill	1	Yuba County
Olivehurst	1	Yuba County	95961
Olivenhain	1	San Diego County	92024
Oliveto	1	Sonoma County
Olive View	1	Los Angeles County
Olympia	1	Santa Cruz County	95018
Olympic Valley	1	Placer County	96146
Omega	1	Nevada County
Omira	1	Lassen County
Omo Ranch	1	El Dorado County	95684
Omus	1	Sonoma County
O'Neals	1	Madera County	93645
One Hundred Palms	1	Riverside County	92274
Ono	1	San Bernardino County
Ono	1	Shasta County	96072
Ontario	1	San Bernardino County	91758	64
Ontario International Airport	1	San Bernardino County	91761
Onyx	1	Kern County	93255
Opal Cliffs	1	Santa Cruz County	95062
Ophir	1	Placer County	95603
Optimo	1	Butte County
Ora	1	Fresno County
Orange	1	Orange County	92857	69
Orange Center	1	Riverside County
Orange Cove	1	Fresno County	93646
Orange Glen	1	San Diego County	92027
Orange Heights	1	San Bernardino County	91786
Orangehurst	1	Orange County	92633
Orange Park Acres	1	Orange County	92869
Orangevale	1	Sacramento County	95662
Orangwood	1	Los Angeles County	91105
Orcutt	1	Santa Barbara County	93455
Ord	1	Monterey County
Ordbend	1	Glenn County	95943
Ordway	1	San Bernardino County
Oregon City	1	Butte County	95965
Oregon House	1	Yuba County	95962
Orford	1	San Joaquin County
Orick	1	Humboldt County	95555
Orinda	1	Contra Costa County	94563
Orinda Village	1	Contra Costa County	94563
Orland	1	Glenn County	95963
Orleans	1	Humboldt County	95556
Orleans Flat	1	Nevada County
Ormand	1	Riverside County	92509
Oro Fino	1	Siskiyou County	96032
Oro Grande	1	San Bernardino County	92368
Oro Loma	1	Fresno County	93622
Orosi	1	Tulare County	93647
Orosi	1	Tulare County	93647
Oroville	1	Butte County	95965
Oroville East	1	Butte County
Oroville Junc	1	Butte County
Orris	1	Tulare County
Orrs Springs	1	Mendocino County
Ortega	1	San Joaquin County
Ortega	1	Santa Barbara County
Ortonville	1	Ventura County
Osbourne	1	Los Angeles County	90028
Ostrom	1	Yuba County
Oswald	1	Sutter County
Otay	1	San Diego County	92010
Otay Mesa	1	San Diego County	92154
Otterbein	1	Los Angeles County	91748
Outingdale	1	El Dorado County	95684
Outlet	1	Mendocino County
Oval	1	Tulare County	93291
Overlook	1	San Diego County
Owenyo	1	Inyo County
Owl	1	Riverside County
Oxalis	1	Fresno County
Oxford	1	Solano County
Oxford Mill	1	Sierra County
Oxnard	1	Ventura County	93030	36
Oxnard Airport	1	Ventura County	93030
Oxnard Beach	1	Ventura County	93035
Oxy	1	San Bernardino County
Ozol	1	Contra Costa County