- Bank Supplies & Equipment, Dallastown
- Banquet Halls, Dallastown
- Barbers, Dallastown
- Battery, Dallastown - Retail Batteries Stores
- Battery Storage, Dallastown
- Beauty Salons, Dallastown
- Bibles Retail, Dallastown
- Boats & Yachts, Dallastown - Yachts, Sailboats & Boats for Sale
- Book Binders & Folders, Dallastown - Office Supplies
- Book Stores, Dallastown
- Books, Magazines & Newspapers Stores, Dallastown - Bookstores
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- Brethren Church, Dallastown
- Brick Masonry & Bricklayer Contractors, Dallastown - Brick Mason - Install & Repair
- Builders & Contractors, Dallastown
- Builders & Contractors - More, Dallastown
- Building & Home Inspection, Dallastown - Real Estate, Building, Land & House Inspection Service
- Building Construction Consultants, Dallastown - Construction Management & Consulting
- Building Materials, Dallastown - Wholesale, Manufacturers, Dealers & Suppliers
- Building Materials & Supplies, Dallastown
- Bus Rental & Charter Bus Service, Dallastown
- Business Legal Services, Dallastown
- Business Services, Dallastown
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