- Radio Stations & Broadcasting Companies, Charles City
- Ready Mix Concrete, Charles City - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Charles City
- Real Estate, Charles City - Agent, Broker & Companies
- Real Estate Developers, Charles City
- Real Estate Farms & Ranches, Charles City
- Real Estate Properties, Charles City
- Real Estate Services, Charles City
- Recycling Drop-Off Centers, Charles City
- Recycling Scrap & Waste Materials, Charles City - Scrap Metal, etc
- Refrigerator Sales, Service & Repair, Charles City - Fridge
- Refuse Collection & Disposal Services, Charles City
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- Rehabilitation Centers, Products & Services, Charles City
- Rehabilitation Specialists, Charles City
- Religious Organizations, Charles City
- Repair Services, Charles City
- Residential, Charles City
- Residential Apartments, Charles City
- Residential Care Facilities, Charles City
- Residential Construction Contractors, Charles City - General Contractors
- Restaurants/Food & Dining, Charles City
- Retirement Communities & Home, Assisted Living & Apartments, Charles City
- Roofing Consultants, Charles City - Roofing Companies
- Roofing Contractors, Charles City - Roof Repair, Cleaning, Installation & Maintenance - Roofers
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