- Sandwich Shop Restaurants, West Salem
- Scanners & Digitizing Equipment & Supplies, West Salem
- Screen Printing, West Salem
- Secondary Schools, West Salem
- Security Brokers & Dealers, West Salem
- Septic Tank Installation & Repair, West Salem - Septic Systems
- Septic Tank Pumping & Cleaning, West Salem - Septic Systems
- Septic Tanks & Septic Systems Contractors, West Salem - Installation, Repair, Service, Cleaning & Pumping Septic Tanks
- Sewing & Yarn Stores & Supplies, West Salem
- Shopping & Shopping Services, West Salem
- Siding Contractors, West Salem - Vinyl Siding, Wood, Metal & Aluminum Siding Contractors - Installation & Repair
- Signs, West Salem
- Snack Foods, West Salem
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- Snacks & Desserts, West Salem
- Social Services & Welfare, West Salem
- Special Coatings, West Salem - Protective Coatings
- Special Dies Tools Jigs & Fixtures Manufacturers, West Salem
- Specialty Animal Services, West Salem
- Specialty Goods Storage, West Salem
- Specialty Stores, West Salem
- Sporting Goods Equipment Rental, West Salem
- Sporting Goods Stores, West Salem
- Sports Bars & Lounges, West Salem
- Steel Manufacturers, West Salem
- Stocks & Bond Brokers, West Salem
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