- Backhoe & Bulldozer Contractors, Commerce City - Backhoe & Dozer Services
- Bail Bonds, Commerce City
- Baker Equipment & Supplies, Commerce City - Donut Maker, etc
- Bakeries, Commerce City
- Balloons Hot & Cold Air, Commerce City
- Balloons Hot Air Manufacturers, Commerce City
- Banks, Commerce City
- Banquet Halls, Commerce City
- Baptist Churches, Commerce City
- Barber Shops, Commerce City
- Barbers, Commerce City
- Bars, Commerce City
- Bars & Grills, Commerce City
- Basement Waterproofing - Waterproofing Contractors, Commerce City - Foundation & Concrete Waterproofing
- Bathroom Fixtures, Commerce City - Bathroom Faucets, Bathtubs, Sinks, Shower Heads & Fixtures, etc
- Bathroom Remodeling, Commerce City - Bathroom Remodel & Planning Services
- Battery Stores, Commerce City
- Beauty Salons, Commerce City
- Beer & Wine Stores, Commerce City
- Beer Taverns, Commerce City
- Belting & Belting Supplies Wholesale, Commerce City
- Belting Supplies & Equipment, Commerce City
- Berean Church, Commerce City
- Bereavement Services, Commerce City
- Beverage & Juice Bottlers Manufacturers, Commerce City
- Beverage Non-Alcoholic Manufacturers, Commerce City
- Beverage Stores, Commerce City
- Beverages, Commerce City
- Bicycle Rentals, Commerce City - Bike Rental
- Bicycle Repair & Service, Commerce City - Bike Repair Shops
- Bicycle Shops, Commerce City - Road, Hybrid, Folding, BMX, Electric & Mountain Bikes Stores & Dealers
- Biological Research, Commerce City - Biological Labs
- Bistros, Commerce City
- Boat Services, Commerce City
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- Boats & Yachts, Commerce City - Yachts, Sailboats & Boats for Sale
- Boiler Repair & Cleaning, Commerce City
- Bonds Surety & Fidelity, Commerce City
- Book Stores, Commerce City
- Books, Magazines & Newspapers Stores, Commerce City - Bookstores
- Boots Retail, Commerce City
- Bottled Gas, Lp Gas & Propane Dealers, Commerce City
- Bottling Manufacturing, Commerce City
- Bowling Equipment, Commerce City
- Brake Service & Repair, Commerce City - Brake Pads
- Breads & Grains, Commerce City
- Breakfast Restaurants, Commerce City
- Brick Masonry & Bricklayer Contractors, Commerce City - Brick Mason - Install & Repair
- Builders & Contractors, Commerce City
- Builders & Contractors - More, Commerce City
- Builders Hardware Stores, Commerce City
- Building & Property Maintenance & Services, Commerce City
- Building Construction Consultants, Commerce City - Construction Management & Consulting
- Building Hardware & Materials, Commerce City
- Building Materials, Commerce City - Wholesale, Manufacturers, Dealers & Suppliers
- Building Materials & Supplies, Commerce City
- Building Restoration & Preservation, Commerce City
- Building Site Preparation Contractors, Commerce City - Land Preparation & Land Clearing
- Burial Vaults, Commerce City
- Bus Dealers, Commerce City
- Bus Rental & Charter Bus Service, Commerce City
- Bus Repair & Service, Commerce City
- Business & Professional Associations, Commerce City
- Business Communication Consultants, Commerce City
- Business Legal Services, Commerce City
- Business Management Consultants, Commerce City
- Business Services, Commerce City
- Business Wholesale, Commerce City
- Business, Vocational & Technical, Commerce City
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