- Bagels, East Hampton
- Bakeries, East Hampton
- Balloons & Helium, East Hampton
- Banks, East Hampton
- Barber Shops, East Hampton
- Barbers, East Hampton
- Bars, East Hampton
- Bars & Grills, East Hampton
- Bathroom Accessories & Fixtures, East Hampton - Bath Accessories, Vanity & Mirrors
- Bathroom Remodeling, East Hampton - Bathroom Remodel & Planning Services
- Beach & Water Related Services, East Hampton
- Beauty Salons, East Hampton
- Bed & Breakfast, East Hampton
- Bedding & Linens Stores, East Hampton - Bed Sheets, Quilts and Coverlets, Cushions, Pillows, Slipcovers & Bed & Table Linens
- Beer & Wine Stores, East Hampton
- Beer Taverns, East Hampton
- Beverage Stores, East Hampton
- Bicycle Parts & Accessories, East Hampton
- Bicycle Racks & Security Systems, East Hampton
- Bicycle Rentals, East Hampton - Bike Rental
- Bicycle Repair & Service, East Hampton - Bike Repair Shops
- Bicycle Shops, East Hampton - Road, Hybrid, Folding, BMX, Electric & Mountain Bikes Stores & Dealers
- Billing Services, East Hampton
- Bistros, East Hampton
- Boat Fishing Charters & Tours, East Hampton
- Boat Lettering & Signs, East Hampton - Boat Painting
- Boat Services, East Hampton
- Boat Storage , East Hampton - Equipment & Services
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- Boiler Repair & Cleaning, East Hampton
- Book Binders & Folders, East Hampton - Office Supplies
- Book Stores, East Hampton
- Bookkeeping Services Licensed, East Hampton
- Bookkeeping Systems & Services, East Hampton
- Books, Magazines & Newspapers Stores, East Hampton - Bookstores
- Botanical & Zoological Gardens, East Hampton
- Botanical Gardens, East Hampton
- Boutiques & Boutique Items, East Hampton
- Brake Service & Repair, East Hampton - Brake Pads
- Brick Masonry & Bricklayer Contractors, East Hampton - Brick Mason - Install & Repair
- Bricks, Blocks & Stone Products, East Hampton - Companies, Wholesale, Manufacturers & Suppliers
- Builders & Contractors, East Hampton
- Builders & Contractors - More, East Hampton
- Building & Home Inspection, East Hampton - Real Estate, Building, Land & House Inspection Service
- Building & Property Maintenance & Services, East Hampton
- Building Construction Consultants, East Hampton - Construction Management & Consulting
- Building Hardware & Materials, East Hampton
- Building Materials, East Hampton - Wholesale, Manufacturers, Dealers & Suppliers
- Building Materials & Supplies, East Hampton
- Burglar & Alarm Systems Manufacturers, East Hampton
- Burglar Alarm Systems, East Hampton
- Business & Professional Associations, East Hampton
- Business & Trade Organizations, East Hampton
- Business Legal Services, East Hampton
- Business Management Consultants, East Hampton
- Business Services, East Hampton
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