- Radio Stations & Broadcasting Companies, Hillsboro
- Railroad Companies, Hillsboro
- Ready Mix Concrete, Hillsboro - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Hillsboro
- Real Estate, Hillsboro - Agent, Broker & Companies
- Real Estate Appraiser, Hillsboro - Appraisal Services
- Real Estate Appraisers & Consulting Services, Hillsboro
- Real Estate Consultants, Hillsboro
- Real Estate Services, Hillsboro
- Recycling Drop-Off Centers, Hillsboro
- Refrigerated Storage & Warehouse, Hillsboro - Warehousing
- Rehabilitation Centers, Products & Services, Hillsboro
- Rehabilitation Specialists, Hillsboro
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- Religious Organizations, Hillsboro
- Religious Practitioners, Hillsboro
- Repair Services, Hillsboro
- Residential Care Facilities, Hillsboro
- Residential Construction Contractors, Hillsboro - General Contractors
- Restaurants/Food & Dining, Hillsboro
- Retail Book Stores, Hillsboro
- Retirement Communities & Home, Assisted Living & Apartments, Hillsboro
- Road Construction, Hillsboro - Companies & Contractors
- Road Construction & Repair Contractors, Hillsboro
- Roofing Consultants, Hillsboro - Roofing Companies
- Roofing Contractors, Hillsboro - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Rv Parks, Hillsboro
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