- Bakeries, Duncansville
- Bankruptcy Attorneys & Lawyers, Duncansville
- Bankruptcy Lawyers & Attorneys, Duncansville
- Banks, Duncansville
- Banquet Halls, Duncansville
- Baptist Churches, Duncansville
- Barbers, Duncansville
- Baseball Cards & Sports Memorabilia, Duncansville
- Bathroom Accessories & Fixtures, Duncansville - Bath Accessories, Vanity & Mirrors
- Bathroom Fixtures, Duncansville - Bathroom Faucets, Bathtubs, Sinks, Shower Heads & Fixtures, etc
- Bathroom Remodeling, Duncansville - Bathroom Remodel & Planning Services
- Beauty Salons, Duncansville
- Bedroom Furniture Stores, Duncansville - Master & Kids Bedroom Furniture Sets & Beds
- Beverage Stores, Duncansville
- Bicycle & Motorcycle Services, Duncansville
- Billiard & Pool Parlors, Duncansville
- Boat Covers, Tops & Upholstery, Duncansville
- Boat Services, Duncansville
- Boats & Yachts, Duncansville - Yachts, Sailboats & Boats for Sale
- Bonds, Duncansville
- Bonds Surety & Fidelity, Duncansville
- Book Stores, Duncansville
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- Bookkeeping Services Licensed, Duncansville
- Bookkeeping Systems & Services, Duncansville
- Books, Magazines & Newspapers Stores, Duncansville - Bookstores
- Breakfast Restaurants, Duncansville
- Brethren Church, Duncansville
- Brick Masonry & Bricklayer Contractors, Duncansville - Brick Mason - Install & Repair
- Builders & Contractors, Duncansville
- Builders & Contractors - More, Duncansville
- Builders Hardware Stores, Duncansville
- Building & Home Inspection, Duncansville - Real Estate, Building, Land & House Inspection Service
- Building Construction Consultants, Duncansville - Construction Management & Consulting
- Building Materials, Duncansville - Wholesale, Manufacturers, Dealers & Suppliers
- Building Materials & Supplies, Duncansville
- Burglar & Alarm Service, Duncansville - Monitoring Service
- Burglar Alarm Systems, Duncansville
- Bus Lines, Duncansville - Bus Transportation
- Bus Rental & Charter Bus Service, Duncansville
- Business & Professional Associations, Duncansville
- Business Insurance, Duncansville
- Business Legal Services, Duncansville
- Business Management Consultants, Duncansville
- Business Services, Duncansville
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