- Baby Stores, Williamsville - Baby Accessories & Clothes
- Bakeries, Williamsville
- Baking Supplies & Needs, Williamsville - Flavoring Extracts, Flour & More
- Banks, Williamsville
- Banners, Flags, Pennants, Decals, Posters & Signs, Williamsville
- Banquet Halls, Reception Halls & Party Facilities, Williamsville
- Baptist Churches, Williamsville
- Barbecue Grills & Supplies, Williamsville
- Barber Shops, Williamsville
- Barbers, Williamsville
- Bars, Williamsville
- Bars & Grills, Williamsville
- Bathing Accessories, Williamsville
- Beauty Salons, Williamsville
- Bed Parts & Frames Metal Wood & Other, Williamsville
- Bedding & Linens Stores, Williamsville - Bed Sheets, Quilts and Coverlets, Cushions, Pillows, Slipcovers & Bed & Table Linens
- Bedroom Furniture Stores, Williamsville - Master & Kids Bedroom Furniture Sets & Beds
- Beer & Wine Stores, Williamsville
- Beer Taverns, Williamsville
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- Beverage Stores, Williamsville
- Billiard & Pool Parlors, Williamsville
- Bonds, Williamsville
- Books, Magazines & Newspapers Stores, Williamsville - Bookstores
- Boutiques & Boutique Items, Williamsville
- Brake Service & Repair, Williamsville - Brake Pads
- Breakfast Restaurants, Williamsville
- Builders & Contractors, Williamsville
- Building & Home Inspection, Williamsville - Real Estate, Building, Land & House Inspection Service
- Building Construction Consultants, Williamsville - Construction Management & Consulting
- Building Materials, Williamsville - Wholesale, Manufacturers, Dealers & Suppliers
- Building Materials & Supplies, Williamsville
- Business & Professional Associations, Williamsville
- Business Brokers, Williamsville
- Business Insurance, Williamsville
- Business Legal Services, Williamsville
- Business Management Consultants, Williamsville
- Business Services, Williamsville
- Business, Vocational & Technical, Williamsville
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