- Sandwich Shop Restaurants, Louisville
- Satellite Dish Antennas & Equipment Dealers, Louisville
- Scrap & Waste Materials, Louisville
- Screen Houses, Louisville
- Screen Printing, Louisville
- Secondary Schools, Louisville
- Security Brokers & Dealers, Louisville
- Septic Tank Installation & Repair, Louisville - Septic Systems
- Septic Tank Pumping & Cleaning, Louisville - Septic Systems
- Septic Tanks & Septic Systems Contractors, Louisville - Installation, Repair, Service, Cleaning & Pumping Septic Tanks
- Sewer & Drain Cleaning & Repair, Louisville - Drain Cleaner & Installation Services
- Shopping & Shopping Services, Louisville
- Siding Contractors, Louisville - Vinyl Siding, Wood, Metal & Aluminum Siding Contractors - Installation & Repair
- Skating Rink & Hockey Operation Services, Louisville
- Small Appliances, Louisville
- Snacks & Desserts, Louisville
- Snow Removal Services, Louisville - Snow Plow Service
- Social Services & Welfare, Louisville
- Societies & Foundation Associations, Louisville
- Special Events & Party Supply Rental, Louisville
- Specialty Animal Services, Louisville
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- Specialty Stores, Louisville
- Sporting Goods Manufacturers, Louisville
- Sporting Goods Stores, Louisville
- Sports Medicine, Louisville - Doctors, Physicians & Surgeons
- Staffing & Support Services, Louisville
- Stamp Collecting & Coin Dealers , Louisville
- Steel & Metal Goods, Louisville - Steel Distributors
- Steel Manufacturers, Louisville
- Stocks & Bond Brokers, Louisville
- Stoves & Furnace Equipment, Louisville - Fittings & Repair Parts
- Sunrooms & Solarium Construction Contractors, Louisville - Build & Repair
- Sunrooms, Greenhouses, Solariums & Atrium Builders, Louisville - Build & Repair
- Surveyor Services, Louisville - Surveying Service
- Swimming Pool Designing & Consulting, Louisville
- Swimming Pool, Sauna & Spa Contractors, Louisville
- Swimming Pools & Equipment Manufacturers, Louisville
- Swimming Pools Contractors, Louisville - Install Inground - Above Ground Pools
- Swimming Pools Management Services, Louisville
- Swimming Pools Repair, Service, Supplies, Sale & Installation, Louisville
- Swimming Pools Supplies, Equipment & Accessories, Louisville
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