- Bagels, Amityville
- Baked Goods, Snacks & Sweets, Amityville
- Bakeries, Amityville
- Baking Supplies & Needs, Amityville - Flavoring Extracts, Flour & More
- Balloons Hot Air Manufacturers, Amityville
- Bank Supplies & Equipment, Amityville
- Banks, Amityville
- Banquet Halls, Reception Halls & Party Facilities, Amityville
- Baptist Churches, Amityville
- Barbecue Restaurants, Amityville
- Barber Shop & Beauty Salon Supplies & Equipment, Amityville - Beauty & Barber Supplies
- Barber Shops, Amityville
- Barbers, Amityville
- Bars, Amityville
- Bars & Grills, Amityville
- Bathroom Remodeling, Amityville - Bathroom Remodel & Planning Services
- Battery, Amityville - Retail Batteries Stores
- Battery Storage, Amityville
- Beach & Water Related Services, Amityville
- Beauty Salons, Amityville
- Beer & Wine Stores, Amityville
- Beer Taverns, Amityville
- Beverage & Juice Bottlers Manufacturers, Amityville
- Beverage Non-Alcoholic Manufacturers, Amityville
- Beverage Stores, Amityville
- Bicycle Parts & Accessories, Amityville
- Bicycle Rentals, Amityville - Bike Rental
- Bicycle Repair & Service, Amityville - Bike Repair Shops
- Bicycle Shops, Amityville - Road, Hybrid, Folding, BMX, Electric & Mountain Bikes Stores & Dealers
- Billing Services, Amityville
- Boat & Sailboat Equipment & Supplies Repair & Service, Amityville
- Boat & Saling Clubs, Amityville
- Boat Services, Amityville
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- Boat Storage , Amityville - Equipment & Services
- Boat, Yacht & Sail Boat Transport, Amityville
- Boating & Swimming Clubs, Amityville
- Boats & Yachts, Amityville - Yachts, Sailboats & Boats for Sale
- Book Publishers, Amityville - Book Printing & Publishing
- Book Stores, Amityville
- Bookkeeping Systems & Services, Amityville
- Books, Magazines & Newspapers Stores, Amityville - Bookstores
- Botanical & Zoological Gardens, Amityville
- Botanical Gardens, Amityville
- Bottling Manufacturing, Amityville
- Brake Service & Repair, Amityville - Brake Pads
- Brakes Manufacturers, Amityville
- Breakfast Restaurants, Amityville
- Builders & Contractors, Amityville
- Builders & Contractors - More, Amityville
- Building & Property Maintenance & Services, Amityville
- Building Construction Consultants, Amityville - Construction Management & Consulting
- Building Hardware & Materials, Amityville
- Building Materials, Amityville - Wholesale, Manufacturers, Dealers & Suppliers
- Building Materials & Supplies, Amityville
- Burglar Alarm Systems, Amityville
- Bus Lines, Amityville - Bus Transportation
- Bus Rental & Charter Bus Service, Amityville
- Business & Professional Associations, Amityville
- Business & Trade Organizations, Amityville
- Business Communication Consultants, Amityville
- Business Insurance, Amityville
- Business Legal Services, Amityville
- Business Management Consultants, Amityville
- Business Services, Amityville
- Business Studio Rental, Amityville
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