- Dairy Farms, Courtenay
- Dairy Products - Wholesale & Retail, Courtenay
- Dance Companies, Courtenay
- Dancing Instructions, Courtenay
- Day Spas, Courtenay
- Deck, Patio & Gazebo Design, Building, Cleaning, Repair & Maintenance Contractors, Courtenay
- Decorating & Designing Services, Courtenay
- Delicatessen Grocers, Courtenay
- Delicatessen Restaurants, Courtenay
- Dental Certified Specialists, Courtenay
- Dentists, Courtenay
- Denturists, Courtenay
- Deodorant, Disinfectants & Germicides, Courtenay
- Department Stores, Courtenay
- Desktop Publishing, Courtenay
- Diesel Engine, Courtenay
- Dieticians & Diet Counseling, Courtenay
- Direct Mail Advertising Services, Courtenay
- Direct Selling Businesses, Courtenay
- Dirt, Courtenay
- Disc Jockeys, Courtenay
- Discount Stores, Courtenay - Clothing, Grocery, Furniture, Etc
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- Disease, Handicap & Disability Services, Organizations & Groups, Courtenay
- District Judges, Courtenay
- Diving Instruction, Courtenay
- Divorce Counseling & Mediation, Courtenay
- Doctors, Physicians & Surgeons, Courtenay
- Door & Gate Operating Devices, Courtenay
- Door Glass & Mirrors, Courtenay
- Doors & Door Frames, Courtenay - Exterior, Interior, French, Front Entry, Patio, Storm, Garage & Sliding Glass Doors
- Drafting Services, Courtenay
- Drainage Contractors, Courtenay - Install & Repair Drainage Systems
- Dressmaking & Sewing Schools, Courtenay
- Drinking Establishments, Courtenay
- Driveway, Parking Lot & Blacktop Contractors, Courtenay - Construction, Repair & Maintenance
- Drugs, Pharmaceutical Products & Toiletries - Wholesale & Manufacturers, Courtenay
- Dry Cleaning & Laundry, Courtenay - Dry Cleaners
- Dryers Sales, Service & Repair, Courtenay - Gas & Electric
- Drywall Contractors, Courtenay - Drywall Repair & Installation Services
- Drywall, Insulation & Plaster Contractors, Courtenay - Installation & Repair Services
- Dunlop Tires, Courtenay - Dealers
- Durable & Non Durable Goods & Products, Courtenay
- Durable Goods & Products, Courtenay
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