- Dairy Products - Wholesale & Retail, Owen Sound
- Dance Companies, Owen Sound
- Day Spas, Owen Sound
- Debt Management Assistance & Services, Owen Sound
- Deck, Patio & Gazebo Design, Building, Cleaning, Repair & Maintenance Contractors, Owen Sound
- Decorating & Designing Services, Owen Sound
- Dental Clinics, Owen Sound
- Dental Laboratories, Owen Sound
- Dentists, Owen Sound
- Denturists, Owen Sound
- Department Stores, Owen Sound
- Diamonds & Precious & Semi-Precious Stones, Owen Sound
- Digital Printing & Imaging Service, Owen Sound
- Dimension Stone Products, Owen Sound
- Diner Restaurants, Owen Sound
- Direct Mail Advertising, Owen Sound
- Direct Mail Advertising Services, Owen Sound
- Dirt, Owen Sound
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- Disc Jockeys, Owen Sound
- Discount Stores, Owen Sound - Clothing, Grocery, Furniture, Etc
- Disease, Handicap & Disability Services, Organizations & Groups, Owen Sound
- Dispensing Machines, Owen Sound
- Diving Equipment & Supplies, Owen Sound - Scuba & Snorkel Gear & Masks Shops
- Diving Instruction, Owen Sound
- Dock Construction - Build & Repair, Owen Sound - Dock Builders
- Doctors, Physicians & Surgeons, Owen Sound
- Drafting Services, Owen Sound
- Drinking Establishments, Owen Sound
- Driveway, Parking Lot & Blacktop Contractors, Owen Sound - Construction, Repair & Maintenance
- Dry Cleaning & Laundry, Owen Sound - Dry Cleaners
- Drywall Contractors, Owen Sound - Drywall Repair & Installation Services
- Drywall, Insulation & Plaster Contractors, Owen Sound - Installation & Repair Services
- Dunlop Tires, Owen Sound - Dealers
- Durable & Non Durable Goods & Products, Owen Sound
- Durable Goods & Products, Owen Sound
- Dwelling Operators Except Apartment, Owen Sound
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