- Racing Including Track Operations, Preston
- Radio & Television Repair Shops , Preston - TV Repair
- Radio Stations & Broadcasting Companies, Preston
- Real Estate, Preston - Agent, Broker & Companies
- Real Estate Agent & Broker Services, Preston
- Real Estate Agent - Property Lessors, Preston
- Real Estate Broker, Preston
- Real Estate Services, Preston
- Recycling Scrap & Waste Materials, Preston - Scrap Metal, etc
- Refrigeration & Air Conditioning Contractors, Preston - Installation, Repair, Sales & Service
- Refuse Collection & Disposal Services, Preston
- Refuse Systems & Garbage Disposal, Preston
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- Religious Organizations, Preston
- Rental & Leasing Business Equipment, Preston
- Repair Services, Preston
- Residential, Preston
- Residential Apartments, Preston
- Residential Care Facilities, Preston
- Restaurants/Food & Dining, Preston
- Retirement Communities & Home, Assisted Living & Apartments, Preston
- Rods, Springs & Suspension Equipment & Supplies, Preston
- Roofing Consultants, Preston - Roofing Companies
- Roofing Contractors, Preston - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Ryder Truck Rental , Preston - Ryder Moving
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