- Dance Companies, Massapequa Park
- Data Processing Equipment & Supplies , Massapequa Park
- Day Spas, Massapequa Park
- Decorating & Designing Services, Massapequa Park
- Delicatessen Restaurants, Massapequa Park
- Dental Bonding & Cosmetic Dentistry, Massapequa Park - Cosmetic Dentist & Tooth Bonding
- Dentists, Massapequa Park
- Department Stores, Massapequa Park
- Diamonds & Precious & Semi-Precious Stones, Massapequa Park
- Diet Center, Massapequa Park
- Dieticians & Diet Counseling, Massapequa Park
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- Direct Mail Advertising Services, Massapequa Park
- Dishwashers Sales, Service & Repair, Massapequa Park
- Displays & Display Installation Service, Massapequa Park - Trade Show Displays
- Doctorate Degree, Massapequa Park
- Doctors, Physicians & Surgeons, Massapequa Park
- Donuts, Massapequa Park
- Drinking Establishments, Massapequa Park
- Drugs, Pharmaceutical Products & Toiletries - Wholesale & Manufacturers, Massapequa Park
- Dry Cleaning & Laundry, Massapequa Park - Dry Cleaners
- Dryers Sales, Service & Repair, Massapequa Park - Gas & Electric
- Durable & Non Durable Goods & Products, Massapequa Park
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