- Organic food store
- Oriental goods store
- Otolaryngologist
- Orthodontist
- Outdoor swimming pool
- Office accessories wholesaler
- Office equipment rental service
- Orphanage
- Office supply wholesaler
- Orthodox synagogue
- Oyster bar restaurant
- Orthopedic surgeon
- Oil and gas exploration service
- Ophthalmology clinic
- Otolaryngology clinic
- Office services
- Open air museum
- Oil field equipment supplier
- Olive oil cooperative
- Olive oil bottling company