- Salvage Yards, Junk Yards & Wrecker Service, Hartford City
- Sand Gravel & Aggregate, Hartford City
- Sandwich Shop Restaurants, Hartford City
- Satellite Dish Antennas & Equipment Dealers, Hartford City
- Scrap & Waste Machinery, Hartford City
- Scrap & Waste Materials, Hartford City
- Secondary Schools, Hartford City
- Security Brokers & Dealers, Hartford City
- Security Services, Hartford City
- Seeds & Bulbs Wholesale & Growers, Hartford City
- Senior Citizens Service & Health Organizations, Hartford City
- Septic Tank Pumping & Cleaning, Hartford City - Septic Systems
- Sewer & Drain Cleaning & Repair, Hartford City - Drain Cleaner & Installation Services
- Sewer Construction Contractors, Hartford City - Sewer Line, Pipe Installation & Repair Services
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- Sheriff's Department, Hartford City
- Shopping & Shopping Services, Hartford City
- Social Services & Welfare, Hartford City
- Specialty Stores, Hartford City
- Sporting & Recreational Camps, Hartford City
- Sporting Goods Stores, Hartford City
- State Government, Hartford City
- Steel Manufacturers, Hartford City
- Steel Used, Hartford City
- Stock & Bond Brokers & Dealers, Hartford City
- Stocks & Bond Brokers, Hartford City
- Submarine Sandwich Restaurants, Hartford City
- Substance Abuse Clinics, Hartford City - Alcoholism, Addiction & Drug Abuse Treatment Centers
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