- Observation deck
- Orthodox church
- Others
- Orphanage
- Observatory
- Office supply store
- Open air museum
- Orchard
- Office services
- Obstetrician-gynecologist
- Outdoor activity organiser
- Outdoor furniture store
- Ophthalmologist
- Oil change service
- Outdoor movie theater
- Oral surgeon
- Oil refinery
- Outerwear store
- Outdoor clothing and equipment shop
- Outlet store