- B F Goodrich, Mills River
- B F Goodrich Tires , Mills River - Dealers
- Bakeries, Mills River
- Banks, Mills River
- Baptist Churches, Mills River
- Barbers, Mills River
- Bean Growers, Mills River
- Beauty Salons, Mills River
- Beer & Ale - Wholesale, Mills River
- Beverage & Juice Bottlers Manufacturers, Mills River
- Beverage Non-Alcoholic Manufacturers, Mills River
- Beverage Stores, Mills River
- Beverages, Mills River
- Biofeedback Therapy & Training, Mills River
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- Bonds, Mills River
- Bottling Manufacturing, Mills River
- Brake Service & Repair, Mills River - Brake Pads
- Bricks, Blocks & Stone Products, Mills River - Companies, Wholesale, Manufacturers & Suppliers
- Builders & Contractors, Mills River
- Builders & Contractors - More, Mills River
- Building Construction Consultants, Mills River - Construction Management & Consulting
- Building Materials & Supplies, Mills River
- Burglar & Alarm Service, Mills River - Monitoring Service
- Burglar Alarm Systems, Mills River
- Bus Rental & Charter Bus Service, Mills River
- Business Management Consultants, Mills River
- Business Services, Mills River
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