- Orthopedic shoe store
- Outdoor furniture store
- Orchard
- Oil and gas exploration service
- Outdoor activity organiser
- Outdoor sports store
- Occupational therapist
- Orthopedic clinic
- Oral and maxillofacial surgeon
- Olive oil bottling company
- Outdoor clothing and equipment shop
- Orchestra
- Outboard motor store
- Obanzai restaurant
- Oilfield
- Oil refinery
- Optometrist
- Osteopath
- Open air museum
- Outdoor equestrian facility