Olancha, California
Old Bailey Place, California
Old Bretz Mill, California
Old Corral, California
Old Fig Garden, California
Old Forbestown, California
Old Fort Jim, California
Old Garlock, California
Old Gilroy, California
Old Hopland, California
Old Hulbert Place, California
Old Ornbaun Hot Springs, California
Old Pino, California
Old Red Rock Place, California
Old River, California
Old Station, California
Old Town, California
Oleander, California
Olema, California
Oleum, California
Olive, California
Olive Hill, California
Olivehurst, California
Omira, California
Omo Ranch, California
Ono, California
Ontario, California
Onyx, California
Opal Cliffs, California
Ophir, California
Ora, California
Orange, California
Orange Cove, California
Orange Park Acres, California
Orangevale, California
Orcutt, California
Ordbend, California
Oregon City, California
Oregon House, California
Orick, California
