- Radiologists, Portland - Radiology Doctors, Physicians & Surgeons
- Radiotelephone Communications, Portland
- Ready Mix Concrete, Portland - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Portland
- Real Estate, Portland - Agent, Broker & Companies
- Real Estate Appraiser, Portland - Appraisal Services
- Real Estate Appraisers & Consulting Services, Portland
- Real Estate Developers, Portland
- Real Estate Management, Portland
- Real Estate Referral & Information Services, Portland
- Real Estate Rental Information, Portland
- Real Estate Rentals, Portland
- Real Estate Services, Portland
- Recycling Drop-Off Centers, Portland
- Refiners & Smelters Metals, Portland
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- Rehabilitation Centers, Products & Services, Portland
- Rehabilitation Specialists, Portland
- Religious Organizations, Portland
- Repair Services, Portland
- Residential, Portland
- Residential Apartments, Portland
- Residential Care Facilities, Portland
- Residential Construction Contractors, Portland - General Contractors
- Restaurant & Lounge, Bar, Or Pub, Portland
- Restaurants/Food & Dining, Portland
- Retirement Communities & Home, Assisted Living & Apartments, Portland
- Rock Shops, Portland
- Roofing Consultants, Portland - Roofing Companies
- Roofing Contractors, Portland - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Rv Parks, Portland
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