- Backhoe & Bulldozer Contractors, Lambertville - Backhoe & Dozer Services
- Bagels, Lambertville
- Bakeries, Lambertville
- Banks, Lambertville
- Banquet Halls, Lambertville
- Baptist Churches, Lambertville
- Bar Supplies, Equipment & Fixtures, Lambertville
- Barber Shops, Lambertville
- Barbers, Lambertville
- Bars, Lambertville
- Bars & Grills, Lambertville
- Beauty Salons, Lambertville
- Bed & Breakfast, Lambertville
- Beer & Wine Stores, Lambertville
- Beer Taverns, Lambertville
- Beverage Equipment, Lambertville
- Beverage Stores, Lambertville
- Bicycle Rentals, Lambertville - Bike Rental
- Bicycle Repair & Service, Lambertville - Bike Repair Shops
- Bicycle Shops, Lambertville - Road, Hybrid, Folding, BMX, Electric & Mountain Bikes Stores & Dealers
- Bistros, Lambertville
- Boats & Yachts, Lambertville - Yachts, Sailboats & Boats for Sale
- Bonds, Lambertville
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- Book Publishers, Lambertville - Book Printing & Publishing
- Book Stores, Lambertville
- Books, Magazines & Newspapers Stores, Lambertville - Bookstores
- Boutiques & Boutique Items, Lambertville
- Brake Service & Repair, Lambertville - Brake Pads
- Brethren Church, Lambertville
- Brick Masonry & Bricklayer Contractors, Lambertville - Brick Mason - Install & Repair
- Bricks, Blocks & Stone Products, Lambertville - Companies, Wholesale, Manufacturers & Suppliers
- Builders & Contractors, Lambertville
- Builders & Contractors - More, Lambertville
- Building & Home Inspection, Lambertville - Real Estate, Building, Land & House Inspection Service
- Building Construction Consultants, Lambertville - Construction Management & Consulting
- Building Design & Construction Consultants, Lambertville
- Building Materials, Lambertville - Wholesale, Manufacturers, Dealers & Suppliers
- Building Materials & Supplies, Lambertville
- Burglar Alarm Systems, Lambertville
- Bus Rental & Charter Bus Service, Lambertville
- Business & Professional Associations, Lambertville
- Business Legal Services, Lambertville
- Business Management Consultants, Lambertville
- Business Planning & Consulting, Lambertville
- Business Services, Lambertville
- Business Wholesale, Lambertville
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