- Banks, Napierville
- Barber Shops, Napierville
- Barbers, Napierville
- Beauty Consultants, Napierville
- Beauty Salons, Napierville
- Bicycle Shops, Napierville - Road, Hybrid, Folding, BMX, Electric & Mountain Bikes Stores & Dealers
- Boat & Yacht Cleaning & Detailing, Napierville
- Boat Services, Napierville
- Boats & Yachts, Napierville - Yachts, Sailboats & Boats for Sale
- Bookkeeping Systems & Services, Napierville
- Books, Magazines & Newspapers Stores, Napierville - Bookstores
- Boutiques & Boutique Items, Napierville
- Brakes & Brake Parts, Napierville - Brake Pads, Rotors, Calipers, Lines, etc
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- Bricks, Blocks & Stone Products, Napierville - Companies, Wholesale, Manufacturers & Suppliers
- Builders & Contractors, Napierville
- Builders & Contractors - More, Napierville
- Building Construction Consultants, Napierville - Construction Management & Consulting
- Building Hardware & Materials, Napierville
- Building Materials, Napierville - Wholesale, Manufacturers, Dealers & Suppliers
- Building Materials & Supplies, Napierville
- Burglar Alarm Systems, Napierville
- Bus Rental & Charter Bus Service, Napierville
- Business Legal Services, Napierville
- Business Services, Napierville
- Butcher Shops, Napierville
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