- Racing Car Supplies, Oxford
- Radio & Television Repair Shops , Oxford - TV Repair
- Radio Stations & Broadcasting Companies, Oxford
- Radiologists, Oxford - Radiology Doctors, Physicians & Surgeons
- Ready Mix Concrete, Oxford - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Oxford
- Real Estate, Oxford - Agent, Broker & Companies
- Real Estate Rentals, Oxford
- Real Estate Services, Oxford
- Records, Tapes, CDs - Used & Vintage, Oxford
- Recreational Equipment & Supplies Companies, Oxford
- Recreational Organizations, Oxford
- Recreational Services, Oxford
- Reducing Exercise & Weight Control Services, Oxford
- Refrigerated Storage & Warehouse, Oxford - Warehousing
- Rehabilitation Centers, Products & Services, Oxford
- Rehabilitation Specialists, Oxford
- Religious Education, Oxford
- Religious Goods & Church Supplies Stores, Oxford
- Religious Organizations, Oxford
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- Religious Services, Oxford
- Rental & Leasing Business Equipment, Oxford
- Repair Services, Oxford
- Research Services, Oxford
- Residential, Oxford
- Residential Apartments, Oxford
- Residential Care Facilities, Oxford
- Residential Construction Contractors, Oxford - General Contractors
- Restaurant Lobster, Oxford
- Restaurants - Breakfast Brunch Lunch, Oxford
- Restaurants/Food & Dining, Oxford
- Retirement Communities & Home, Assisted Living & Apartments, Oxford
- Road Construction, Oxford - Companies & Contractors
- Road Construction & Repair Contractors, Oxford
- Road Construction Equipment & Machinery, Oxford
- Roller Skating Rinks, Oxford
- Roofing Consultants, Oxford - Roofing Companies
- Roofing Contractors, Oxford - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Roofing Materials & Supplies, Oxford
- Ryder Truck Rental , Oxford - Ryder Moving
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