- Dance Companies, Cowansville
- Day Spas, Cowansville
- Deck, Patio & Gazebo Design, Building, Cleaning, Repair & Maintenance Contractors, Cowansville
- Decorating & Designing Services, Cowansville
- Delicatessen Restaurants, Cowansville
- Dental Laboratories, Cowansville
- Dentists, Cowansville
- Denturists, Cowansville
- Department Stores, Cowansville
- Direct Mail Advertising Services, Cowansville
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- Disaster Insurance, Cowansville
- Disc Jockeys, Cowansville
- Discotheques, Cowansville
- Disease, Handicap & Disability Services, Organizations & Groups, Cowansville
- Doctors, Physicians & Surgeons, Cowansville
- Draperies & Curtains Manufacturers, Cowansville
- Drinking Establishments, Cowansville
- Drugs, Pharmaceutical Products & Toiletries - Wholesale & Manufacturers, Cowansville
- Dry Cleaning & Laundry, Cowansville - Dry Cleaners
- Dryers Sales, Service & Repair, Cowansville - Gas & Electric
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