- Railroad & Subway Construction Contractors, Romeoville
- Railroad Contractors, Romeoville
- Real Estate, Romeoville - Agent, Broker & Companies
- Real Estate Agent - Property Lessors, Romeoville
- Real Estate Management, Romeoville
- Real Estate Services, Romeoville
- Recreation Management Services, Romeoville
- Recycling Drop-Off Centers, Romeoville
- Recycling Scrap & Waste Materials, Romeoville - Scrap Metal, etc
- Refrigerated Storage & Warehouse, Romeoville - Warehousing
- Refuse Collection & Disposal Services, Romeoville
- Refuse Systems & Garbage Disposal, Romeoville
- Rehabilitation Centers, Products & Services, Romeoville
- Rehabilitation Specialists, Romeoville
- Rehabilitational Job Training Services, Romeoville
- Relief Organizations, Romeoville
- Religious Organizations, Romeoville
- Repair Services, Romeoville
- Research Services, Romeoville
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- Residential, Romeoville
- Residential Apartments, Romeoville
- Residential Construction Contractors, Romeoville - General Contractors
- Restaurant Equipment, Romeoville
- Restaurant Equipment & Supplies, Romeoville
- Restaurant Equipment Cleaning, Romeoville - Restaurant Cleaners
- Restaurant Supplies & Equipment, Romeoville
- Restaurants - Breakfast Brunch Lunch, Romeoville
- Restaurants/Food & Dining, Romeoville
- Retail Book Stores, Romeoville
- Retirement Communities & Home, Assisted Living & Apartments, Romeoville
- Road Construction, Romeoville - Companies & Contractors
- Road Construction & Repair Contractors, Romeoville
- Road Construction Equipment & Machinery, Romeoville
- Roofing Consultants, Romeoville - Roofing Companies
- Roofing Contractors, Romeoville - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Rubber & Plastic Stamps Wholesale Equipment & Supplies, Romeoville
- Rubber Products - Retail, Romeoville
- Ryder Truck Rental , Romeoville - Ryder Moving
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