- Bail Bonds, Dayton
- Bakeries, Dayton
- Baking Supplies & Needs, Dayton - Flavoring Extracts, Flour & More
- Banks, Dayton
- Barbers, Dayton
- Bars, Dayton
- Bars & Grills, Dayton
- Beach & Water Related Services, Dayton
- Beauty Salons, Dayton
- Bedding & Linens Stores, Dayton - Bed Sheets, Quilts and Coverlets, Cushions, Pillows, Slipcovers & Bed & Table Linens
- Bedroom Furniture Stores, Dayton - Master & Kids Bedroom Furniture Sets & Beds
- Beer Taverns, Dayton
- Beverage Stores, Dayton
- Bicycle Rentals, Dayton - Bike Rental
- Bicycle Repair & Service, Dayton - Bike Repair Shops
- Bicycle Shops, Dayton - Road, Hybrid, Folding, BMX, Electric & Mountain Bikes Stores & Dealers
- Billing Services, Dayton
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- Boating & Swimming Clubs, Dayton
- Book Publishers, Dayton - Book Printing & Publishing
- Brake Service & Repair, Dayton - Brake Pads
- Breakfast Restaurants, Dayton
- Bricks, Blocks & Stone Products, Dayton - Companies, Wholesale, Manufacturers & Suppliers
- Builders & Contractors, Dayton
- Builders & Contractors - More, Dayton
- Building Construction Consultants, Dayton - Construction Management & Consulting
- Building Design & Construction Consultants, Dayton
- Building Materials, Dayton - Wholesale, Manufacturers, Dealers & Suppliers
- Building Materials & Supplies, Dayton
- Burglar Alarm Systems, Dayton
- Business & Professional Associations, Dayton
- Business & Trade Organizations, Dayton
- Business Legal Services, Dayton
- Business Services, Dayton
- Business, Vocational & Technical, Dayton
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