- Bail Bonds, Somerville
- Bail Bonds Referral Service, Somerville
- Balloons - Novelty, Toy & Decorative, Somerville
- Banks, Somerville
- Baptist Churches, Somerville
- Barbecue Restaurants, Somerville
- Barbers, Somerville
- Battery, Somerville - Retail Batteries Stores
- Battery Storage, Somerville
- Beauty Salons, Somerville
- Bereavement Services, Somerville
- Bird Repellent, Barrier & Control, Somerville
- Board Of Education, Somerville
- Bonds Surety & Fidelity, Somerville
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- Book Publishers, Somerville - Book Printing & Publishing
- Bookkeeping Services Commercial, Somerville
- Bookkeeping Systems & Services, Somerville
- Boutiques & Boutique Items, Somerville
- Builders & Contractors, Somerville
- Builders & Contractors - More, Somerville
- Building & Property Maintenance & Services, Somerville
- Building Materials & Supplies, Somerville
- Burial Vaults, Somerville
- Business & Professional Associations, Somerville
- Business Legal Services, Somerville
- Business Services, Somerville
- Business, Vocational & Technical, Somerville
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