- Radiator Coolant & Solvents, Upper Darby - Engine Coolant
- Radiator Repair, Upper Darby - Gas Tank Repair
- Radio Stations & Broadcasting Companies, Upper Darby
- Radiologists, Upper Darby - Radiology Doctors, Physicians & Surgeons
- Ready Mix Concrete, Upper Darby - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Upper Darby
- Real Estate, Upper Darby - Agent, Broker & Companies
- Real Estate Appraiser, Upper Darby - Appraisal Services
- Real Estate Appraisers & Consulting Services, Upper Darby
- Real Estate Developers, Upper Darby
- Real Estate Management, Upper Darby
- Real Estate Services, Upper Darby
- Recording Studio - Equipment & Rental, Upper Darby
- Records, Tapes, CDs - Used & Vintage, Upper Darby
- Rehabilitation Centers, Products & Services, Upper Darby
- Rehabilitation Specialists, Upper Darby
- Religious Education, Upper Darby
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- Religious Organizations, Upper Darby
- Religious Practitioners, Upper Darby
- Rental & Leasing Business Equipment, Upper Darby
- Repair Services, Upper Darby
- Research Services, Upper Darby
- Residential, Upper Darby
- Residential Apartments, Upper Darby
- Residential Care Facilities, Upper Darby
- Restaurant Equipment, Upper Darby
- Restaurant Equipment & Supplies, Upper Darby
- Restaurant Supplies & Equipment, Upper Darby
- Restaurants/Food & Dining, Upper Darby
- Reverends, Upper Darby
- Roofing Consultants, Upper Darby - Roofing Companies
- Roofing Contractors, Upper Darby - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Roofing Materials & Supplies, Upper Darby
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