- Dairy Products - Manufacturers, Vaughan
- Dairy Products - Wholesale & Retail, Vaughan
- Dance Companies, Vaughan
- Day Spas, Vaughan
- Debt Management Assistance & Services, Vaughan
- Deck, Patio & Gazebo Design, Building, Cleaning, Repair & Maintenance Contractors, Vaughan
- Decorating & Designing Services, Vaughan
- Dental Hygienists, Vaughan
- Dentists, Vaughan
- Denturists, Vaughan
- Department Stores, Vaughan
- Die Cutting Machine, Supplies & Equipment, Vaughan
- Dies, Vaughan
- Diesel, Vaughan - Engine Fuels, Oils & Lubricants
- Digital Printing & Imaging Service, Vaughan
- Diner Restaurants, Vaughan
- Direct Mail Advertising Services, Vaughan
- Disc Jockeys, Vaughan
- Discount Stores, Vaughan - Clothing, Grocery, Furniture, Etc
- Display Fixtures & Materials, Vaughan
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- Displays & Display Installation Service, Vaughan - Trade Show Displays
- Divorce & Family Law Attorneys & Lawyers, Vaughan
- Doctors, Physicians & Surgeons, Vaughan
- Donuts, Vaughan
- Door & Gate Operating Devices, Vaughan
- Door Closers & Checks, Vaughan
- Doors & Door Frames, Vaughan - Exterior, Interior, French, Front Entry, Patio, Storm, Garage & Sliding Glass Doors
- Doors Fire Resistant, Vaughan
- Doors Glass & Mirrors, Vaughan
- Drafting Equipment, Vaughan
- Drafting Services, Vaughan
- Draperies & Curtains Manufacturers, Vaughan
- Drapery & Curtain Fabric Manufacturers, Vaughan
- Drapery Hardware & Blinds & Shades Manufacturers, Vaughan
- Drinking Establishments, Vaughan
- Dry Cleaning & Laundry, Vaughan - Dry Cleaners
- Drywall Contractors, Vaughan - Drywall Repair & Installation Services
- Dunlop Tires, Vaughan - Dealers
- Durable & Non Durable Goods & Products, Vaughan
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