- Bakeries, Wellsville
- Balloons - Novelty, Toy & Decorative, Wellsville
- Banks, Wellsville
- Banquet Halls, Wellsville
- Baptist Churches, Wellsville
- Bars, Wellsville
- Bars & Grills, Wellsville
- Battery, Wellsville - Retail Batteries Stores
- Battery Storage, Wellsville
- Bearings, Wellsville
- Beauty Salons, Wellsville
- Bedroom Furniture Stores, Wellsville - Master & Kids Bedroom Furniture Sets & Beds
- Beer Taverns, Wellsville
- Beverage Stores, Wellsville
- Bible Church, Wellsville
- Book Stores, Wellsville
- Bowling Centers, Wellsville
- Breakfast Restaurants, Wellsville
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- Buffet Restaurants, Wellsville
- Builders & Contractors, Wellsville
- Builders & Contractors - More, Wellsville
- Builders Hardware Stores, Wellsville
- Building & Home Inspection, Wellsville - Real Estate, Building, Land & House Inspection Service
- Building Construction Consultants, Wellsville - Construction Management & Consulting
- Building Design & Construction Consultants, Wellsville
- Building Materials, Wellsville - Wholesale, Manufacturers, Dealers & Suppliers
- Building Materials & Supplies, Wellsville
- Burglar Alarm Systems, Wellsville
- Bus Rental & Charter Bus Service, Wellsville
- Business & Professional Associations, Wellsville
- Business & Trade Organizations, Wellsville
- Business Legal Services, Wellsville
- Business Management Consultants, Wellsville
- Business Services, Wellsville
- Business, Vocational & Technical, Wellsville
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