- Sand Gravel & Aggregate, Sheridan
- Sandwich Shop Restaurants, Sheridan
- Satellite Communication Downlinking & Uplinking, Sheridan
- Satellite TV Service, Sheridan
- Savings Banks, Sheridan
- Screen Printing, Sheridan
- Security & Surveillance System & Equipment, Sheridan
- Security Brokers & Dealers, Sheridan
- Senior Citizens Service & Health Organizations, Sheridan
- Sheet Metal, Sheridan
- Sheet Metal Contractors, Sheridan - Sheet Metal Fabrication
- Sheet Metal Fabricators & Ductwork Contractors, Sheridan
- Shopping & Shopping Services, Sheridan
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- Siding Contractors, Sheridan - Vinyl Siding, Wood, Metal & Aluminum Siding Contractors - Installation & Repair
- Signs, Sheridan
- Skating Rink & Hockey Operation Services, Sheridan
- Snacks & Desserts, Sheridan
- Social Services & Welfare, Sheridan
- Societies & Foundation Associations, Sheridan
- Special Dies Tools Jigs & Fixtures Manufacturers, Sheridan
- Special Interest Schools Or Instruction, Sheridan
- Specialty Stores, Sheridan
- Staffing & Support Services, Sheridan
- State Government, Sheridan
- Stocks & Bond Brokers, Sheridan
- Stone, Sheridan
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