- Office Supplies, Equipment & Office Furniture Stores, Suttons Bay
- Oil & Gas Exploration & Development, Suttons Bay - Oil Field Exploration, Monitoring & Remediation
- Oil Industry & Oil Field Equipment & Services, Suttons Bay - Oil Companies
- Opticians, Suttons Bay
- Optometrists, Suttons Bay - Eye Doctors, Physicians & Surgeons (Optometry)
- Orchard Service, Suttons Bay
- Organs Tuning & Repair, Suttons Bay
- Ornamental Greenhouses, Suttons Bay
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