- Racing Car Supplies, Lorton
- Radiator Coolant & Solvents, Lorton - Engine Coolant
- Radiologists, Lorton - Radiology Doctors, Physicians & Surgeons
- Railroad Services, Lorton
- Ready Mix Concrete, Lorton - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Lorton
- Real Estate, Lorton - Agent, Broker & Companies
- Real Estate Agent - Property Lessors, Lorton
- Real Estate Appraisers & Consulting Services, Lorton
- Real Estate Consultants, Lorton
- Real Estate Management, Lorton
- Real Estate Services, Lorton
- Recycling Scrap & Waste Materials, Lorton - Scrap Metal, etc
- Refrigeration & Cooling Equipment, Parts & Supplies , Lorton - Water Cooler, Ice Machine, Beverage Dispenser, etc
- Refrigeration Repair & Service, Lorton - Ac, Freezer, Refrigerator Repair
- Refrigerator Sales, Service & Repair, Lorton - Fridge
- Refuse Systems & Garbage Disposal, Lorton
- Religious Organizations, Lorton
- Repair Services, Lorton
- Research & Development Bureaus, Lorton - Commercial, Economic, Sociological & Educational Research
- Research & Development Labs, Lorton - Laboratories
- Research Services, Lorton
- Residential, Lorton
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- Residential Apartments, Lorton
- Residential Care Facilities, Lorton
- Residential Construction Contractors, Lorton - General Contractors
- Residential Electricians, Lorton - Electric Contractors
- Residential Landfills, Lorton
- Restaurant Equipment, Lorton
- Restaurant Equipment & Supplies, Lorton
- Restaurant Supplies & Equipment, Lorton
- Restaurants/Food & Dining, Lorton
- Retirement Communities & Home, Assisted Living & Apartments, Lorton
- Rheumatologists, Lorton - Rheumatology Doctors, Physicians & Surgeons
- Riding & Rodeo Services, Lorton
- Rifle & Pistol Ranges, Lorton
- Rigging Service & Crane Hoisting, Lorton
- Roadside Assistance, Road Service & Towing Service, Lorton
- Rods, Springs & Suspension Equipment & Supplies, Lorton
- Roofing & Siding Materials, Equipments & Supplies, Lorton - Wholesale, Manufacturers & Suppliers
- Roofing Consultants, Lorton - Roofing Companies
- Roofing Contractors, Lorton - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Roofing Materials & Supplies, Lorton
- Rv Parks, Lorton
- Ryder Truck Rental , Lorton - Ryder Moving
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