- Bakeries, Louiseville
- Bankruptcy Services, Louiseville
- Banks, Louiseville
- Barber Shops, Louiseville
- Bars, Louiseville
- Bathing Accessories, Louiseville
- Beauty Consultants, Louiseville
- Beauty Salons, Louiseville
- Beer Taverns, Louiseville
- Bicycle Parts & Accessories, Louiseville
- Bicycle Shops, Louiseville - Road, Hybrid, Folding, BMX, Electric & Mountain Bikes Stores & Dealers
- Boat & Yacht Cleaning & Detailing, Louiseville
- Boat Services, Louiseville
- Boats & Yachts, Louiseville - Yachts, Sailboats & Boats for Sale
- Bookkeeping Systems & Services, Louiseville
- Boutiques & Boutique Items, Louiseville
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- Bowling Centers, Louiseville
- Brick Masonry & Bricklayer Contractors, Louiseville - Brick Mason - Install & Repair
- Bridge, Tunnel & Elevated Highway Construction, Louiseville - Highway, Street And Bridge Contractors
- Builders & Contractors, Louiseville
- Builders & Contractors - More, Louiseville
- Builders Hardware Stores, Louiseville
- Building Construction Consultants, Louiseville - Construction Management & Consulting
- Building Hardware & Materials, Louiseville
- Building Materials, Louiseville - Wholesale, Manufacturers, Dealers & Suppliers
- Building Materials & Supplies, Louiseville
- Burglar Alarm Systems, Louiseville
- Business & Professional Associations, Louiseville
- Business Legal Services, Louiseville
- Business Services, Louiseville
- Butcher Shops, Louiseville
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