- Optician
- Outerwear store
- Outlet mall
- Observation deck
- Office equipment supplier
- Office furniture store
- Organic food store
- Outdoor movie theater
- Off roading area
- Outboard motor store
- Off-road race track
- Office space rental agency
- Off track betting shop
- Organic shop
- Orchestra
- Orchard
- Oil wholesaler
- Orthodox church
- Ophthalmology clinic
- Office