- Banks, Postville
- Barbers, Postville
- Bars, Postville
- Bars & Grills, Postville
- Beach & Water Related Services, Postville
- Beauty Salons, Postville
- Bedding & Linens Stores, Postville - Bed Sheets, Quilts and Coverlets, Cushions, Pillows, Slipcovers & Bed & Table Linens
- Bedroom Furniture Stores, Postville - Master & Kids Bedroom Furniture Sets & Beds
- Beer Taverns, Postville
- Book Stores, Postville
- Bowling Centers, Postville
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- Brake Service & Repair, Postville - Brake Pads
- Bricks, Blocks & Stone Products, Postville - Companies, Wholesale, Manufacturers & Suppliers
- Builders & Contractors, Postville
- Builders & Contractors - More, Postville
- Building Hardware & Materials, Postville
- Building Materials & Supplies, Postville
- Business & Professional Associations, Postville
- Business Legal Services, Postville
- Business Services, Postville
- Business, Vocational & Technical, Postville
- Butchers & Meat Markets - Manufacturers, Postville
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