- Banks, Marathon
- Banquet Halls, Marathon
- Barber Shops, Marathon
- Barricades, Marathon
- Bars, Marathon
- Bars & Grills, Marathon
- Beach & Water Related Services, Marathon
- Beauty Salons, Marathon
- Beer Taverns, Marathon
- Bonds, Marathon
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- Brick Masonry & Bricklayer Contractors, Marathon - Brick Mason - Install & Repair
- Builders & Contractors, Marathon
- Builders & Contractors - More, Marathon
- Building Hardware & Materials, Marathon
- Building Materials, Marathon - Wholesale, Manufacturers, Dealers & Suppliers
- Building Materials & Supplies, Marathon
- Bus Lines, Marathon - Bus Transportation
- Business Services, Marathon
- Butcher Shops, Marathon
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