- Organic restaurant
- Others
- Organic food store
- Observation deck
- Office supply store
- Organic farm
- Outdoor furniture store
- Office space rental agency
- Outlet store
- Office furniture store
- Office of Vital Records
- Oriental goods store
- Outerwear store
- Organic shop
- Opel dealer
- Open air museum
- Oil & natural gas company
- Outdoor sports store
- Obstetrician-gynecologist
- Opera house