- Backhoe & Bulldozer Contractors, Middletown - Backhoe & Dozer Services
- Bakeries, Middletown
- Banks, Middletown
- Banners, Flags, Pennants, Decals, Posters & Signs, Middletown
- Baptist Churches, Middletown
- Barns, Middletown
- Bars, Middletown
- Bars & Grills, Middletown
- Beauty Salons, Middletown
- Bed & Breakfast, Middletown
- Beer Taverns, Middletown
- Beverage Stores, Middletown
- Bible Church, Middletown
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- Blacksmiths, Middletown
- Book Publishers, Middletown - Book Printing & Publishing
- Brake Service & Repair, Middletown - Brake Pads
- Brew Pubs, Middletown
- Builders & Contractors, Middletown
- Builders & Contractors - More, Middletown
- Builders Hardware Stores, Middletown
- Building Construction Consultants, Middletown - Construction Management & Consulting
- Building Materials & Supplies, Middletown
- Business Legal Services, Middletown
- Business Services, Middletown
- Business, Vocational & Technical, Middletown
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