California Cities that begin with O

38 cities

City
County
2025 Pop. ↓
OaklandAlameda County433,544
OxnardVentura County196,206
OntarioSan Bernardino County186,953
OceansideSan Diego County167,390
OrangeOrange County137,594
OakleyContra Costa County47,281
OrangevaleSacramento County36,325
OildaleKern County35,324
OrcuttSanta Barbara County31,695
OakdaleStanislaus County22,931
OrindaContra Costa County19,264
OrovilleButte County19,085
OlivehurstYuba County18,356
Oak ParkVentura County13,581
Orange CoveFresno County9,398
OrosiTulare County9,182
OrlandGlenn County8,002
Oak HillsSan Bernardino County7,578
Oroville EastButte County7,480
OjaiVentura County7,355
OceanoSan Luis Obispo County7,287
Oak ViewVentura County7,069
OakhurstMadera County5,547
Old Fig GardenFresno County5,104
Old StineKern County4,515
OasisRiverside County2,996
Orange BlossomSan Joaquin County1,900
OccidentalSonoma County1,048
Oak RunShasta County701
OnyxKern County687
Olde StockdaleKern County679
Oak GlenRiverside County302
OrickHumboldt County296
OlanchaInyo County166
Old RiverKern County132
OcotilloImperial County116
Oak ShoresMonterey County114
OnoShasta County34