- Bagels, Port Jefferson Station
- Bakeries, Port Jefferson Station
- Ballroom Dance Hall, Port Jefferson Station
- Bankruptcy Attorneys & Lawyers, Port Jefferson Station
- Bankruptcy Attorneys & Lawyers, Port Jefferson Station
- Bankruptcy Lawyers & Attorneys, Port Jefferson Station
- Banks, Port Jefferson Station
- Baptist Churches, Port Jefferson Station
- Barbers, Port Jefferson Station
- Bars & Grills, Port Jefferson Station
- Baseball & Softball Clubs, Port Jefferson Station
- Bathroom Remodeling, Port Jefferson Station - Bathroom Remodel & Planning Services
- Beauty Salons, Port Jefferson Station
- Bedroom Furniture Stores, Port Jefferson Station - Master & Kids Bedroom Furniture Sets & Beds
- Beverage Stores, Port Jefferson Station
- Bicycle Rentals, Port Jefferson Station - Bike Rental
- Bicycle Repair & Service, Port Jefferson Station - Bike Repair Shops
- Billiard & Pool Instruction, Port Jefferson Station
- Billiard & Pool Parlors, Port Jefferson Station
- Blood Bank & Center, Port Jefferson Station
- Boat Covers, Tops & Upholstery, Port Jefferson Station
- Boat Motors & Marine Equipment Dealers, Port Jefferson Station
- Boats & Yachts, Port Jefferson Station - Yachts, Sailboats & Boats for Sale
- Book Publishers, Port Jefferson Station - Book Printing & Publishing
- Book Stores, Port Jefferson Station
- Book Stores - Law & Legal Books, Port Jefferson Station
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- Bookkeeping Services Licensed, Port Jefferson Station
- Bookkeeping Systems & Services, Port Jefferson Station
- Boutiques & Boutique Items, Port Jefferson Station
- Boxing Clubs & Instruction, Port Jefferson Station
- Brake Service & Repair, Port Jefferson Station - Brake Pads
- Brake Service Equipment, Port Jefferson Station
- Breakfast Restaurants, Port Jefferson Station
- Brick Masonry & Bricklayer Contractors, Port Jefferson Station - Brick Mason - Install & Repair
- Brokers Merchandise, Port Jefferson Station
- Builders & Contractors, Port Jefferson Station
- Builders & Contractors - More, Port Jefferson Station
- Builders Hardware Stores, Port Jefferson Station
- Building Construction Consultants, Port Jefferson Station - Construction Management & Consulting
- Building Hardware & Materials, Port Jefferson Station
- Building Materials, Port Jefferson Station - Wholesale, Manufacturers, Dealers & Suppliers
- Building Materials & Supplies, Port Jefferson Station
- Burglar Alarm Systems, Port Jefferson Station
- Bus Parts Equipment & Supplies, Port Jefferson Station
- Business & Professional Associations, Port Jefferson Station
- Business Brokers, Port Jefferson Station
- Business Communication Consultants, Port Jefferson Station
- Business Insurance, Port Jefferson Station
- Business Legal Services, Port Jefferson Station
- Business Management Consultants, Port Jefferson Station
- Business Services, Port Jefferson Station
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