- Racing Car Supplies, Johnstown
- Radio Stations & Broadcasting Companies, Johnstown
- Ready Mix Concrete, Johnstown - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Johnstown
- Real Estate, Johnstown - Agent, Broker & Companies
- Real Estate Services, Johnstown
- Recreational Organizations, Johnstown
- Recreational Vehicles & Campers Rent & Lease, Johnstown
- Rehabilitation Centers, Products & Services, Johnstown
- Rehabilitation Specialists, Johnstown
- Religious Organizations, Johnstown
- Repair Services, Johnstown
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- Research Services, Johnstown
- Residential, Johnstown
- Residential Apartments, Johnstown
- Residential Care Facilities, Johnstown
- Residential Construction Contractors, Johnstown - General Contractors
- Restaurants/Food & Dining, Johnstown
- Retirement & Estate Planning, Johnstown
- Retirement Planning Consultants & Services, Johnstown
- Rubber Products, Johnstown
- Rubber Stamps, Johnstown
- Rvs Sales, Rental & Leasing, Johnstown
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