- Radiator Coolant & Solvents, Hartville - Engine Coolant
- Radio Stations & Broadcasting Companies, Hartville
- Real Estate, Hartville - Agent, Broker & Companies
- Real Estate Services, Hartville
- Reflexologists, Hartville
- Refrigeration & Cooling Equipment, Parts & Supplies , Hartville - Water Cooler, Ice Machine, Beverage Dispenser, etc
- Refrigeration Repair & Service, Hartville - Ac, Freezer, Refrigerator Repair
- Refugee Programs, Resettlement & Health Services, Hartville
- Rehabilitation Centers, Products & Services, Hartville
- Rehabilitation Specialists, Hartville
- Religious Education, Hartville
- Religious Goods & Church Supplies Stores, Hartville
- Religious Organizations, Hartville
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- Repair Services, Hartville
- Research Services, Hartville
- Residential Care Facilities, Hartville
- Residential Construction Contractors, Hartville - General Contractors
- Restaurants/Food & Dining, Hartville
- Retirement Communities & Home, Assisted Living & Apartments, Hartville
- Retirement Home Referral Service, Hartville - Nursing Home & Care Facilities Referrals & Information
- Riding & Rodeo Services, Hartville
- Roofing Consultants, Hartville - Roofing Companies
- Roofing Contractors, Hartville - Roof Repair, Cleaning, Installation & Maintenance - Roofers
- Roofing Materials & Supplies, Hartville
- RV & Campers Repair & Service, Hartville
- RV Repair, Hartville - Recreational Vehicle
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