- Pain Management Doctors, Port Jefferson Station - Pain Medicine Physicians & Surgeons
- Paint & Painting Supplies, Port Jefferson Station
- Paint Stores, Port Jefferson Station
- Painters, Port Jefferson Station - Painting Contractors
- Paper & Cardboard Manufacturers, Port Jefferson Station
- Paper Finishers Manufacturers, Port Jefferson Station
- Paper Products, Port Jefferson Station - Paper Dealers & Distributors
- Party Supplies Rentals, Port Jefferson Station
- Passenger Ground Transportation, Port Jefferson Station
- Passenger Vehicle Dealers, Port Jefferson Station
- Paving Contractors - Driveway, Road, Walkway, Port Jefferson Station - Installation, Repair & Seal - Asphalt & Concrete Pavers
- Pediatric Dentist , Port Jefferson Station - Childrens - Kids Dentist
- Pediatricians, Port Jefferson Station - Pediatrics Doctors, Physicians & Surgeons
- Periodontist, Port Jefferson Station - Periodontal - Gum Disease
- Personal Care, Port Jefferson Station
- Personal Legal Services, Port Jefferson Station
- Personal Services, Port Jefferson Station
- Personal Watercraft Dealers, Port Jefferson Station
- Pet Care Services, Port Jefferson Station
- Pet Food & Supplies, Port Jefferson Station
- Pet Grooming & Boarding Services, Port Jefferson Station
- Pet Shops & Supplies, Port Jefferson Station
- Pet Sitting Services, Port Jefferson Station
- Pets Stores & Pet Supplies , Port Jefferson Station
- Pharmacy & Drug Stores, Port Jefferson Station - Drugstore - Chemists
- Photographers, Port Jefferson Station
- Photography, Port Jefferson Station
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- Photography, Port Jefferson Station
- Physical Therapists, Port Jefferson Station - Physical Therapy
- Piano & Organ Stores & Dealers - Sales & Rental, Port Jefferson Station
- Pizza Restaurant 1 Of 2, Port Jefferson Station
- Plastic Surgeons, Port Jefferson Station - Plastic Surgery Doctors, Physicians & Surgeons
- Playgrounds Parks & Trails, Port Jefferson Station
- Plumbers & Plumbing Contractors, Port Jefferson Station - Installation, Repair & Replace Services
- Plumbing - Sewer & Drain Cleaning & Repair, Port Jefferson Station
- Plumbing Supply Manufacturers, Port Jefferson Station
- Podiatrists, Port Jefferson Station - Foot Doctors, Physicians & Surgeons (Podiatric Medicine)
- Preschools, Port Jefferson Station
- Pressure Washing Services, Equipment & Restoration, Port Jefferson Station - Pressure Cleaning Service
- Printers Services, Port Jefferson Station
- Printing Services & Publishing Services, Port Jefferson Station
- Process Serving Services, Port Jefferson Station - Process Server
- Product Rental & Leasing, Port Jefferson Station
- Product Repair Services, Port Jefferson Station
- Professional, Port Jefferson Station
- Professional Services, Port Jefferson Station
- Professionals Equipment & Supplies, Port Jefferson Station
- Promotional Products, Port Jefferson Station - Promotional Items, Corporate Gifts, Personalized Gifts, etc
- Promotional Services, Port Jefferson Station
- Property Management Companies, Port Jefferson Station - Real Estate Management
- Public Accountants, Port Jefferson Station
- Public Libraries, Port Jefferson Station
- Publishing & Printing Manufacturers, Port Jefferson Station
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