- Racing Including Track Operations, Maynardville
- Radio Station Equipment & Systems, Maynardville
- Ready Mix Concrete, Maynardville - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Maynardville
- Real Estate, Maynardville - Agent, Broker & Companies
- Real Estate Agent - Property Lessors, Maynardville
- Recycling Drop-Off Centers, Maynardville
- Refuse Collection & Disposal, Maynardville
- Refuse Systems & Garbage Disposal, Maynardville
- Rehabilitation Centers, Products & Services, Maynardville
- Rehabilitation Specialists, Maynardville
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- Religious Organizations, Maynardville
- Repair Services, Maynardville
- Residential, Maynardville
- Residential Apartments, Maynardville
- Residential Care Facilities, Maynardville
- Resorts & Hotels, Maynardville
- Restaurants/Food & Dining, Maynardville
- Roofing Consultants, Maynardville - Roofing Companies
- Roofing Contractors, Maynardville - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Roofing Materials & Supplies, Maynardville
- Rv Parks, Maynardville
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