- Sandwich Shop Restaurants, Collinsville
- Savings & Loan Associations, Collinsville
- Savings Banks, Collinsville
- Screen Printing, Collinsville
- Seafood Restaurants, Collinsville
- Search & Rescue, Collinsville
- Security & Surveillance System & Equipment, Collinsville
- Security Brokers & Dealers, Collinsville
- Security Services, Collinsville
- Sedation Dentistry, Collinsville
- Septic Tank Pumping & Cleaning, Collinsville - Septic Systems
- Septic Tanks & Systems, Collinsville - Wholesale, Dealers & Suppliers
- Sewing Machine Repair & Service, Collinsville
- Sewing Machines, Equipment & Supplies, Collinsville
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- Shopping & Shopping Services, Collinsville
- Siding Contractors, Collinsville - Vinyl Siding, Wood, Metal & Aluminum Siding Contractors - Installation & Repair
- Skating Rink & Hockey Operation Services, Collinsville
- Small Appliances, Collinsville
- Social Services & Welfare, Collinsville
- Sound Systems, Microphones & Equipment, Collinsville
- Specialty Stores, Collinsville
- Sporting Goods Stores, Collinsville
- Staffing & Support Services, Collinsville
- Staples Staplers & Tackers, Collinsville
- Stereo, Audio & Video Equipment Dealers & Stores, Collinsville
- Surveyor Services, Collinsville - Surveying Service
- Surveyors, Collinsville
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