Select all that apply:
- Oakley, Contra Costa County, California19 objects
- Oakmont area, Sonoma County, California3 objects
- Oakville area, Napa Valley, Napa County1 objects
- Olancha (CDP), Inyo County, California17 objects
- Oro Fino Valley, Siskiyou County, California3 objects
- Owens Valley, Inyo County, California147 objects