- Obstetricians & Gynecologists, Roseburg - Ob-Gyn Doctors, Physicians & Surgeons (Obstetrics & Gynecology)
- Occupational Health & Safety, Roseburg
- Occupational Health Care Physicians & Surgeons, Roseburg - Occupational Medicine
- Occupational Health Care Professionals, Roseburg
- Occupational Medicine Doctors, Roseburg - Physicians & Surgeons
- Occupational Therapy, Roseburg - Occupational Health Specialists
- Off Road Vehicles, Roseburg
- Off Road Vehicles Parts & Accessories, Roseburg
- Office Space on Rent, Roseburg - Executive Suites, Meeting Rooms, Conference Rooms, Virtual Offices, etc
- Office Supplies, Equipment & Office Furniture Stores, Roseburg
- Oil & Petroleum Products, Roseburg - Merchant, Wholesalers, etc
- Oil Change & Lubrication, Roseburg - Auto Oil & Quick Lube
- Old Age Homes Service, Roseburg
- Oncologists, Roseburg - Cancer Doctors, Physicians & Surgeons (Oncology)
- Open Bible Church, Roseburg
- Optical Stores - Eyeglasses, Lenses & Sunglasses, Roseburg
- Opticians, Roseburg
- Optometrists, Roseburg - Eye Doctors, Physicians & Surgeons (Optometry)
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- Oral Surgeon, Roseburg - Dentists - Oral & Maxillofacial Surgeons
- Ornamental Metal Work, Roseburg - Steel, Iron, Bronze, etc
- Ornamental Nursery, Roseburg
- Ornamental Nursery Products, Roseburg
- Ornamental Nursery Services, Roseburg
- Orthodontist, Roseburg - Teeth Straightening, Invisalign & Dental Braces
- Orthopedic & Prosthetic Appliances & Shoes, Roseburg - Orthopedic Shoes
- Orthopedists, Roseburg - Orthopedic Surgery Doctors, Physicians & Surgeons
- Orthotics and Prosthetics, Roseburg
- Osteoporosis Doctors, Roseburg - Physicians & Surgeons
- Other Building Materials & Supplies, Roseburg
- Other Lodging, Roseburg
- Outdoor & Lawn & Garden Equipment Repair & Service, Roseburg
- Outdoor Equipment & Accessories, Roseburg
- Outdoor Furniture & Patio Furniture, Roseburg - Garden Furniture Stores
- Outpatient Services, Roseburg - Outpatient Care
- Ownership Organizations, Roseburg
- Oxygen & Respiratory Equipment & Supplies, Roseburg - Oxygen Concentrator, Tank, Machine, etc
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