Name of placeNumber of countiesPrincipal countyLower zip codeUpper zip codeOak Bottom1Shasta County96095 Oakdale1Stanislaus County95361 Oak Glen1Humboldt County Oak Glen1San Bernardino County92399 Oak Grove1Butte County95965 Oak Grove1San Diego County92536 Oak Grove1Santa Clara County Oak Grove1Tulare County Oak Hills1Monterey County92345 Oak Hills1San Bernardino County92345 Oakhurst1Madera County93644 Oak Knoll1Los Angeles County Oak Knoll1Napa County Oak Knoll Hills1Santa Clara County95014 Oak Knolls1Santa Barbara County93455 Oakland1Alameda County9460162Oakland Army Base1Alameda County94626 Oakland Naval Regional Medical Center1Alameda County94627 Oakland Naval Supply Center1Alameda County94625 Oakland Recreational Camp1Tuolumne County95321 Oakley1Contra Costa County94561 Oakmont1Sonoma County Oak Park1Sacramento County95817 Oak Park1San Luis Obispo County93446 Oak Park1Ventura County Oakridge1San Joaquin County Oak Run1Shasta County96069 Oaks1San Luis Obispo County93420 Oak Valley1Ventura County91301 Oak View1Ventura County93022 Oak Village1Ventura County Oakville1Napa County94562 Oakwood1Los Angeles County90004 Oasis1Riverside County92274 Oban1Los Angeles County Obie1Shasta County Obie Junction1Siskiyou County Obregon1Imperial County O'Brien1Shasta County96070 Occidental1Sonoma County95465 Ocean Beach1San Diego County92107 Oceano1San Luis Obispo County93445 Ocean Park1Los Angeles County90405 Oceanside1San Diego County9204958Ocean View1Los Angeles County Ocean View1Orange County Ocean View1San Francisco County Ocean View1Sonoma County94923 Ockenden1Fresno County Ocotillo1Imperial County92259 Ocotillo Wells1San Diego County92004 Octol1Tulare County Ogilby1Imperial County Oil City1Kern County Oildale1Kern County93308 Ojai1Ventura County93023 Ojala1Ventura County Olancha1Inyo County93549 Olcott1Solano County Old Adobe1San Luis Obispo County Old Bretz Mill1Fresno County Old Dale1San Bernardino County Old Forbestown1Butte County Old Fort Jim1El Dorado County95667 Old Fort Tejon1Kern County Old Gilroy1Santa Clara County95020 Old Hilltown1Monterey County Old Hopland1Mendocino County95449 Old Mammoth1Mono County93546 Old Pino1El Dorado County Old Point Comfort1Los Angeles County Old River1Kern County93305 Old San Diego1San Diego County92110 Old Station1Shasta County96071 Old Town1Santa Barbara County Old Towne1Kern County93561 Old Town San Diego1San Diego County92110 Oleander1Fresno County93706 Olema1Marin County94950 Oleo1Orange County Oleum1Contra Costa County Olga1Los Angeles County Olinda1Orange County92821 Olinda1Shasta County96007 Olive1Orange County92865 Olive Hill1Yuba County Olivehurst1Yuba County95961 Olivenhain1San Diego County92024 Oliveto1Sonoma County Olive View1Los Angeles County Olympia1Santa Cruz County95018 Olympic Valley1Placer County96146 Omega1Nevada County Omira1Lassen County Omo Ranch1El Dorado County95684 Omus1Sonoma County O'Neals1Madera County93645 One Hundred Palms1Riverside County92274 Ono1San Bernardino County Ono1Shasta County96072 Ontario1San Bernardino County9175864Ontario International Airport1San Bernardino County91761 Onyx1Kern County93255 Opal Cliffs1Santa Cruz County95062 Ophir1Placer County95603 Optimo1Butte County Ora1Fresno County Orange1Orange County9285769Orange Center1Riverside County Orange Cove1Fresno County93646 Orange Glen1San Diego County92027 Orange Heights1San Bernardino County91786 Orangehurst1Orange County92633 Orange Park Acres1Orange County92869 Orangevale1Sacramento County95662 Orangwood1Los Angeles County91105 Orcutt1Santa Barbara County93455 Ord1Monterey County Ordbend1Glenn County95943 Ordway1San Bernardino County Oregon City1Butte County95965 Oregon House1Yuba County95962 Orford1San Joaquin County Orick1Humboldt County95555 Orinda1Contra Costa County94563 Orinda Village1Contra Costa County94563 Orland1Glenn County95963 Orleans1Humboldt County95556 Orleans Flat1Nevada County Ormand1Riverside County92509 Oro Fino1Siskiyou County96032 Oro Grande1San Bernardino County92368 Oro Loma1Fresno County93622 Orosi1Tulare County93647 Orosi1Tulare County93647 Oroville1Butte County95965 Oroville East1Butte County Oroville Junc1Butte County Orris1Tulare County Orrs Springs1Mendocino County Ortega1San Joaquin County Ortega1Santa Barbara County Ortonville1Ventura County Osbourne1Los Angeles County90028 Ostrom1Yuba County Oswald1Sutter County Otay1San Diego County92010 Otay Mesa1San Diego County92154 Otterbein1Los Angeles County91748 Outingdale1El Dorado County95684 Outlet1Mendocino County Oval1Tulare County93291 Overlook1San Diego County Owenyo1Inyo County Owl1Riverside County Oxalis1Fresno County Oxford1Solano County Oxford Mill1Sierra County Oxnard1Ventura County9303036Oxnard Airport1Ventura County93030 Oxnard Beach1Ventura County93035 Oxy1San Bernardino County Ozol1Contra Costa County
References