- Bakeries, Marlboro
- Balloon Decorating, Marlboro
- Balloons, Marlboro
- Balloons - Novelty, Toy & Decorative, Marlboro
- Ballroom Dance Hall, Marlboro
- Banks, Marlboro
- Barbers, Marlboro
- Bars & Grills, Marlboro
- Bathroom Remodeling, Marlboro - Bathroom Remodel & Planning Services
- Beauty Salons, Marlboro
- Beer & Wine Stores, Marlboro
- Beverage Stores, Marlboro
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- Bible Church, Marlboro
- Boating & Swimming Clubs, Marlboro
- Boats & Yachts, Marlboro - Yachts, Sailboats & Boats for Sale
- Brick Masonry & Bricklayer Contractors, Marlboro - Brick Mason - Install & Repair
- Builders & Contractors, Marlboro
- Builders & Contractors - More, Marlboro
- Building Materials & Supplies, Marlboro
- Burglar Alarm Systems, Marlboro
- Business Legal Services, Marlboro
- Business Services, Marlboro
- Business Studio Rental, Marlboro
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