- Racing Car Supplies, South Amboy
- Radiator Coolant & Solvents, South Amboy - Engine Coolant
- Radiator Repair, South Amboy - Gas Tank Repair
- Radiator Repair & Rebuild, South Amboy
- Radio & Television Repair Shops , South Amboy - TV Repair
- Reading Instruction Schools, South Amboy
- Ready Mix Concrete, South Amboy - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, South Amboy
- Real Estate, South Amboy - Agent, Broker & Companies
- Real Estate Agent - Property Lessors, South Amboy
- Real Estate Services, South Amboy
- Recreational Services, South Amboy
- Recreational Vehicles & Campers Rent & Lease, South Amboy
- Recycling Drop-Off Centers, South Amboy
- Recycling Scrap & Waste Materials, South Amboy - Scrap Metal, etc
- Refrigeration & Air Conditioning Contractors, South Amboy - Installation, Repair, Sales & Service
- Rehabilitation Centers, South Amboy
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- Rehabilitation Centers, Products & Services, South Amboy
- Rehabilitation Specialists, South Amboy
- Religious Goods & Church Supplies Stores, South Amboy
- Religious Organizations, South Amboy
- Repair Services, South Amboy
- Research Services, South Amboy
- Residential, South Amboy
- Residential Apartments, South Amboy
- Residential Care Facilities, South Amboy
- Residential Construction Contractors, South Amboy - General Contractors
- Resource Centers, South Amboy
- Restaurant Management & Consulting, South Amboy - Food Facilities Consultants
- Restaurants/Food & Dining, South Amboy
- Retail Book Stores, South Amboy
- Roadside Assistance, Road Service & Towing Service, South Amboy
- Roofing Contractors, South Amboy - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Rvs Sales, Rental & Leasing, South Amboy
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