- Banks, Mertztown
- Barbecue Restaurants, Mertztown
- Bars & Grills, Mertztown
- Batteries Storage Manufacturers, Mertztown
- Battery, Mertztown - Retail Batteries Stores
- Battery Manufacturers, Mertztown
- Battery Storage, Mertztown
- Beauty Salons, Mertztown
- Bed & Breakfast, Mertztown
- Bicycle Rentals, Mertztown - Bike Rental
- Bicycle Repair & Service, Mertztown - Bike Repair Shops
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- Bicycle Shops, Mertztown - Road, Hybrid, Folding, BMX, Electric & Mountain Bikes Stores & Dealers
- Boiler Repair & Cleaning, Mertztown
- Books, Magazines & Newspapers Stores, Mertztown - Bookstores
- Brick Masonry & Bricklayer Contractors, Mertztown - Brick Mason - Install & Repair
- Bricks, Blocks & Stone Products, Mertztown - Companies, Wholesale, Manufacturers & Suppliers
- Builders & Contractors, Mertztown
- Builders & Contractors - More, Mertztown
- Building Materials & Supplies, Mertztown
- Bus Lines, Mertztown - Bus Transportation
- Business Management Consultants, Mertztown
- Business Services, Mertztown
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