- Race Car Dealers, Merrillville
- Racing Including Track Operations, Merrillville
- Radio & Television Repair Shops , Merrillville - TV Repair
- Radio Stations & Broadcasting Companies, Merrillville
- Radiologists, Merrillville - Radiology Doctors, Physicians & Surgeons
- Radiotelephone Communications, Merrillville
- Radon Testing & Services, Merrillville
- Real Estate, Merrillville - Agent, Broker & Companies
- Real Estate Apartments & Residential, Merrillville
- Real Estate Appraiser, Merrillville - Appraisal Services
- Real Estate Appraisers & Consulting Services, Merrillville
- Real Estate Attorneys & Lawyers, Merrillville
- Real Estate Attorneys & Lawyers, Merrillville
- Real Estate Consultants, Merrillville
- Real Estate Lawyers & Attorneys, Merrillville
- Real Estate Management, Merrillville
- Real Estate Properties, Merrillville
- Real Estate Services, Merrillville
- Records, Tapes, CDs - Used & Vintage, Merrillville
- Recreational Organizations, Merrillville
- Red Wing Shoes, Merrillville
- Reducing Exercise & Weight Control Services, Merrillville
- Reflexologists, Merrillville
- Refractory Systems & Materials, Merrillville
- Refrigeration & Cooling Equipment, Parts & Supplies , Merrillville - Water Cooler, Ice Machine, Beverage Dispenser, etc
- Refrigeration Repair & Service, Merrillville - Ac, Freezer, Refrigerator Repair
- Rehabilitation Centers, Products & Services, Merrillville
- Rehabilitation Specialists, Merrillville
- Relief Organizations, Merrillville
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- Religious Goods & Church Supplies Stores, Merrillville
- Religious Organizations, Merrillville
- Relocation Services, Merrillville
- Rental & Leasing Business Equipment, Merrillville
- Repair Services, Merrillville
- Research & Development Bureaus, Merrillville - Commercial, Economic, Sociological & Educational Research
- Research Services, Merrillville
- Residential, Merrillville
- Residential Apartments, Merrillville
- Residential Care Facilities, Merrillville
- Residential Construction Contractors, Merrillville - General Contractors
- Residential Real Estate Companies, Merrillville
- Restaurant & Food Service Management Services, Merrillville
- Restaurant & Lounge, Bar, Or Pub, Merrillville
- Restaurant Architects, Merrillville
- Restaurant Equipment, Merrillville
- Restaurant Equipment & Supplies, Merrillville
- Restaurant Supplies & Equipment, Merrillville
- Restaurants/Food & Dining, Merrillville
- Resume Service, Merrillville
- Retail Book Stores, Merrillville
- Retirement Communities & Home, Assisted Living & Apartments, Merrillville
- Rheumatologists, Merrillville - Rheumatology Doctors, Physicians & Surgeons
- Rigging Service & Crane Hoisting, Merrillville
- Roofing Consultants, Merrillville - Roofing Companies
- Roofing Contractors, Merrillville - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Roofing Materials & Supplies, Merrillville
- Rubber & Plastic Stamps Wholesale Equipment & Supplies, Merrillville
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