- Racing Car Supplies, Troutdale
- Radiology Equipment & Services, Troutdale - X-Ray Equipment & Supplies
- Ready Mix Concrete, Troutdale - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Troutdale
- Real Estate, Troutdale - Agent, Broker & Companies
- Real Estate Agent - Property Lessors, Troutdale
- Real Estate Management, Troutdale
- Real Estate Services, Troutdale
- Recreational Services, Troutdale
- Recycling Drop-Off Centers, Troutdale
- Refrigeration & Cooling Equipment, Parts & Supplies , Troutdale - Water Cooler, Ice Machine, Beverage Dispenser, etc
- Refrigeration Repair & Service, Troutdale - Ac, Freezer, Refrigerator Repair
- Refuse Collection & Disposal Services, Troutdale
- Rehabilitational Job Training Services, Troutdale
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- Religious Education, Troutdale
- Religious Organizations, Troutdale
- Repair Services, Troutdale
- Research & Development Labs, Troutdale - Laboratories
- Research Services, Troutdale
- Residential, Troutdale
- Residential Apartments, Troutdale
- Residential Construction Contractors, Troutdale - General Contractors
- Resorts & Hotels, Troutdale
- Restaurants/Food & Dining, Troutdale
- Retirement Communities & Home, Assisted Living & Apartments, Troutdale
- Rubber Products - Retail, Troutdale
- Rv Parks, Troutdale
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