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The Communities of
California (CA)

Notes:

- Some communities no longer exist and have been marked with '(H)' to indicate that they are historic.

- When two (or more) communities share the same name, we give some kind of identifying location to help you pick.

O'Brien	Ohm	Opal Cliffs
O'Byrnes Ferry	Ohmer (H)	Opegoi (H)
		Opelto (H)
O'Neals	Oil City	Opera Plaza
- Fresno County	Oil Junction	Ophir
- Madera County	Oildale	Ophir Hill Acres
		Opia (H)
O'Neil Place	Ojai	Opistopia (H)
	Ojala	Opok (H)
Oak Bottom (H)	Ojo De Agua De La Coche	Optimo
Oak Creek Hills
Oak Gardens Estates	Oketo (H)	Ora
	Okowvinjha (H)	Orange
Oak Glen	Okpam (H)	Orange Avenue Junction
- Humboldt County		Orange Center
- San Bernardino County	Ola (H)	Orange Cove
- Butte County	Olancha	Orange Glen
- Calaveras County	Olcott	Orange Heights
- San Diego County	Old Adobe	Orange Park Acres
- San Mateo County	Old Bailey Place	Orangehurst
- Santa Clara County	Old Bretz Mill	Orangetree
- Sonoma County	Old Chinatown (H)	Orangevale
- Tulare County	Old Corral	Orangwood
- Yuba County (H)	Old Dale	Orchams
	Old Dickenson Ferry	Orchard
Oak Haven Estates	Old Dominion Mine (H)	Orchard Camp (H)
Oak Hill	Old Felton
	Old Forbestown	Orcutt
Oak Hills	Old Fort Jim	- San Diego County
- Monterey County	Old Fort Tejon	- Santa Barbara County
- San Bernardino County	Old Garlock
- Los Angeles County	Old Gilroy	Ordbend
- Napa County	Old Hilltown	Ordway
	Old Hopland	Ore'q (H)
Oak Knoll Hills	Old Hulbert Place	Oregon Bar (H)
Oak Knolls	Old Mammoth
	Old Ornbaun Hot Springs	Oregon City
Oak Park	Old Pino	- Butte County
- Sacramento County	Old Point Comfort
- San Luis Obispo County	Old Red Rock Place	Oregon Gulch (H)
- Ventura County	Old River	Oregon House
	Old San Diego	Orella (H)
Oak Park Estates	Old Station	Orestaco (H)
Oak Ridge Village		Orestimba
Oak Run	Old Town	Orford
Oak Tree Village	- Kern County	Orick
	- Marin County	Oriental
Oak Valley	- Santa Barbara County	Orinda
- Ventura County	- Ventura County	Orinda Park
- Yuba County	- San Diego County	Orinda Village
		Orion (H)
Oak View	Old Towne	Orita
Oak Village	Oleander	Orland
Oakbar	Olema	Orleans
Oakdale	Oleo (H)	Orleans Flat
	Oleum	Orlem (H)
Oakhurst	Olga	Ormand
- Fresno County (H)	Olig (H)	Oro Fino
- Madera County		Oro Grande
- Alameda County	Olinda	Oro Loma (H)
- Yuba County (H)	- Orange County (H)	Oroleve
	- Shasta County	Orosi
Oakley	- Orange County	Oroville
Oakmont		Oroville East
Oakridge	Olive Hill	Oroville Junction
Oakridge Ranches	Olive Springs (H)	Orr's
Oaks	Olive View	Orris
Oakville	Olivehain	Orrs Springs
Oakwood	Olivehurst
	Olivenhain	Ortega
Oasis	Oliver (H)	- San Joaquin County (H)
- Mendocino County	Oliveto	- Santa Barbara County (H)
- Mono County	Olivewood
- Riverside County	Olney (H)	Ortonville
	Ololopa (H)	Orwood
Oat Hill	Olompali	Orwood Tract
	Olposel (H)
Oban	Olsen Crossing	Osacalis (H)
Oberg (H)	Olulato (H)	Osborne
Obie	Olumpali (H)	Osbourne
Obie Junction	Olympia	Oso (H)
Obregon	Olympia Glade	Ostrom (H)
	Olympic	Oswald
Occidental	Olympic Heights
Ocean Beach	Olympic Valley	Otai (H)
Ocean Hills		Otaki (H)
Ocean Park	Omaha Heights	Otay
Ocean Roar	Omaxtux (H)	Otay Mesa
	Omega	Otenashmoo (H)
Ocean View	Omira	Otey's Ranch
- Los Angeles County	Omo Ranch	Oteys Sierra Village (H)
- Orange County	Omochumnes	Otterbein
- San Francisco County	Omus
- Sonoma County		Outingdale
	Onbi (H)	Outlet
Ocean View Estates	Onchomo (H)	Outpost Estates
Oceana	One Hundred Palms
Oceano	Oneida	Oval
Oceano Beach	Oneonta	Ovejo (H)
Oceanside	Onkot (H)	Overlook
Oceanview
Ochoyos (H)	Ono	Owensville (H)
Ockenden	- San Bernardino County	Owenyo (H)
Ocotillo	- Shasta County	Owl
Ocotillo Wells
Octol	Onomio (H)	Oxalis
	Ontario	Oxford
Odd Fellows Park	Onyx	Oxford Mill
Odessa (H)		Oxnard
	Oo-moo-chah (H)	Oxnard Beach
Ogilby		Oxnard Shores
- Imperial County (H)		Oxy

Ogilby (H)		Ozena
- San Diego County		Ozol





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This page was last modified: 21 May 2020

By John Hall

The Communities ofCalifornia (CA)

The Communities of
California (CA)