- Dairy Farm Equipment, Middlebury
- Dairy Products - Wholesale & Retail, Middlebury
- Dance Companies, Middlebury
- Day Spas, Middlebury
- Deciduous Tree Fruits, Middlebury
- Decorating & Designing Services, Middlebury
- Delicatessen Restaurants, Middlebury
- Dentists, Middlebury
- Department Stores, Middlebury
- Designer Clothes & Accessories, Middlebury
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- Developmental Disabilities, Middlebury
- Developmentally Disabled Information & Services, Middlebury
- Direct Mail Advertising Services, Middlebury
- Discount Stores, Middlebury - Clothing, Grocery, Furniture, Etc
- Doctorate Degree, Middlebury
- Doctors, Physicians & Surgeons, Middlebury
- Donuts, Middlebury
- Drinking Establishments, Middlebury
- Dry Cleaning & Laundry, Middlebury - Dry Cleaners
- Drywall, Insulation & Plaster Contractors, Middlebury - Installation & Repair Services
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