- Radio Stations & Broadcasting Companies, Dawson
- Radiotelephone Communications, Dawson
- Railroad Companies, Dawson
- Railroad Services, Dawson
- Ready Mix Concrete, Dawson - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Dawson
- Real Estate, Dawson - Agent, Broker & Companies
- Real Estate Appraiser, Dawson - Appraisal Services
- Real Estate Appraisers & Consulting Services, Dawson
- Real Estate Rentals, Dawson
- Real Estate Services, Dawson
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- Relief Organizations, Dawson
- Religious Organizations, Dawson
- Repair Services, Dawson
- Research & Development Labs, Dawson - Laboratories
- Research Services, Dawson
- Residential, Dawson
- Residential Apartments, Dawson
- Residential Care Facilities, Dawson
- Residential Construction Contractors, Dawson - General Contractors
- Restaurants/Food & Dining, Dawson
- Riding & Rodeo Services, Dawson
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