- Dairy Products - Wholesale & Retail, Newtown
- Dams, Waterways, & Docks Contractors, Newtown
- Dance Companies, Newtown
- Day Spas, Newtown
- Decorating & Designing Services, Newtown
- Delicatessen Restaurants, Newtown
- Delivery & Errand Services, Newtown
- Dental Supplies & Equipment, Newtown
- Dentists, Newtown
- Department Stores, Newtown
- Dialysis Clinics, Newtown - Kidney Dialysis Centers
- Diesel Engine, Newtown
- Dieticians & Diet Counseling, Newtown
- Diner Restaurants, Newtown
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- Direct Mail Advertising Services, Newtown
- Disaster Recovery, Newtown
- Disease, Handicap & Disability Services, Organizations & Groups, Newtown
- Doctors, Physicians & Surgeons, Newtown
- Donuts, Newtown
- Door & Gate Operating Devices, Newtown
- Drinking Establishments, Newtown
- Drive In Restaurants, Newtown
- Driveway, Parking Lot & Blacktop Contractors, Newtown - Construction, Repair & Maintenance
- Drugs, Pharmaceutical Products & Toiletries - Wholesale & Manufacturers, Newtown
- Dry Cleaning & Laundry, Newtown - Dry Cleaners
- Dryers Sales, Service & Repair, Newtown - Gas & Electric
- Drywall Contractors, Newtown - Drywall Repair & Installation Services
- Drywall, Insulation & Plaster Contractors, Newtown - Installation & Repair Services
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