- Bakeries, Rumford
- Bank Supplies & Equipment, Rumford
- Banks, Rumford
- Baptist Churches, Rumford
- Barber Shops, Rumford
- Barbers, Rumford
- Bars & Grills, Rumford
- Bearings, Rumford
- Beauty Salons, Rumford
- Beverage Alcoholic, Rumford
- Beverage Stores, Rumford
- Beverages, Rumford
- Billing Services, Rumford
- Books, Magazines & Newspapers Stores, Rumford - Bookstores
- Bottling Manufacturing, Rumford
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- Bowling Centers, Rumford
- Breakfast Restaurants, Rumford
- Buffet Restaurants, Rumford
- Builders & Contractors, Rumford
- Builders & Contractors - More, Rumford
- Building & Home Inspection, Rumford - Real Estate, Building, Land & House Inspection Service
- Building & Property Maintenance & Services, Rumford
- Building Materials, Rumford - Wholesale, Manufacturers, Dealers & Suppliers
- Building Materials & Supplies, Rumford
- Business & Professional Associations, Rumford
- Business Insurance, Rumford
- Business Legal Services, Rumford
- Business Services, Rumford
- Business, Vocational & Technical, Rumford
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