- Baby Stores, Somersworth - Baby Accessories & Clothes
- Bakeries, Somersworth
- Banks, Somersworth
- Baptist Churches, Somersworth
- Barbers, Somersworth
- Bars & Grills, Somersworth
- Baseball Cards & Sports Memorabilia, Somersworth
- Battery, Somersworth - Retail Batteries Stores
- Battery Storage, Somersworth
- Beauty Salons, Somersworth
- Bedroom Furniture Stores, Somersworth - Master & Kids Bedroom Furniture Sets & Beds
- Beverage & Juice Bottlers Manufacturers, Somersworth
- Beverage Non-Alcoholic Manufacturers, Somersworth
- Beverage Stores, Somersworth
- Bible Church, Somersworth
- Billiard & Pool Parlors, Somersworth
- Billiard Supplies & Equipment, Somersworth - Pool Table
- Billing Services, Somersworth
- Bingo Halls, Supplies & Equipment, Somersworth
- Bird Feeders & Supplies, Somersworth
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- Bonds, Somersworth
- Bottling Manufacturing, Somersworth
- Brake Service & Repair, Somersworth - Brake Pads
- Breakfast Restaurants, Somersworth
- Brick Clay Common Face, Somersworth
- Brick Masonry & Bricklayer Contractors, Somersworth - Brick Mason - Install & Repair
- Bricks, Blocks & Stone Products, Somersworth - Companies, Wholesale, Manufacturers & Suppliers
- Builders & Contractors, Somersworth
- Builders & Contractors - More, Somersworth
- Builders Hardware Stores, Somersworth
- Building Construction Consultants, Somersworth - Construction Management & Consulting
- Building Materials, Somersworth - Wholesale, Manufacturers, Dealers & Suppliers
- Building Materials & Supplies, Somersworth
- Burglar Alarm Systems, Somersworth
- Business & Professional Associations, Somersworth
- Business Legal Services, Somersworth
- Business Planning & Consulting, Somersworth
- Business Services, Somersworth
- Business, Vocational & Technical, Somersworth
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