- Radiator Coolant & Solvents, Monroeville - Engine Coolant
- Radio Stations & Broadcasting Companies, Monroeville
- Railroad Companies, Monroeville
- Real Estate, Monroeville - Agent, Broker & Companies
- Real Estate Agent - Property Lessors, Monroeville
- Real Estate Properties, Monroeville
- Real Estate Property Investment Properties, Monroeville
- Real Estate Services, Monroeville
- Recreational Equipment & Supplies Companies, Monroeville
- Recycling Scrap & Waste Materials, Monroeville - Scrap Metal, etc
- Reducing Exercise & Weight Control Services, Monroeville
- Refrigeration & Cooling Equipment, Parts & Supplies , Monroeville - Water Cooler, Ice Machine, Beverage Dispenser, etc
- Refrigeration Repair & Service, Monroeville - Ac, Freezer, Refrigerator Repair
- Rehabilitation Centers, Products & Services, Monroeville
- Rehabilitation Specialists, Monroeville
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- Relief Organizations, Monroeville
- Religious Counseling, Monroeville
- Religious Organizations, Monroeville
- Religious Services, Monroeville
- Repair Services, Monroeville
- Residential, Monroeville
- Residential Apartments, Monroeville
- Residential Care Facilities, Monroeville
- Residential Landfills, Monroeville
- Restaurants/Food & Dining, Monroeville
- Retail Book Stores, Monroeville
- Retirement Communities & Home, Assisted Living & Apartments, Monroeville
- Roofing Consultants, Monroeville - Roofing Companies
- Roofing Contractors, Monroeville - Roof Repair, Cleaning, Installation & Maintenance - Roofers
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