- Sand Gravel & Aggregate, Sheridan
- Sandwich Shop Restaurants, Sheridan
- Satellite Dish Antennas & Equipment Dealers, Sheridan
- Savings & Loan Associations, Sheridan
- Savings Banks, Sheridan
- Sawmill & Planing Mills, Sheridan
- Sawmill Supplies & Equipment Repair, Sheridan
- School Bus Transportation Service, Sheridan
- Secondary Schools, Sheridan
- Security Brokers & Dealers, Sheridan
- Senior Citizens Service & Health Organizations, Sheridan
- Septic Tank Installation & Repair, Sheridan - Septic Systems
- Septic Tank Pumping & Cleaning, Sheridan - Septic Systems
- Septic Tanks & Septic Systems Contractors, Sheridan - Installation, Repair, Service, Cleaning & Pumping Septic Tanks
- Septic Tanks & Systems Inspection, Sheridan
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- Shopping & Shopping Services, Sheridan
- Snacks & Desserts, Sheridan
- Social Services & Welfare, Sheridan
- Societies & Foundation Associations, Sheridan
- Solar Energy Companies - Contractors, Sheridan - Solar Panel Installation - Solar Power Systems
- Solar Energy Equipment & Systems - Service & Repair, Sheridan - Solar Power Systems
- Solar Equipment, Sheridan
- Specialty Animal Services, Sheridan
- Specialty Stores, Sheridan
- Sporting Goods Stores, Sheridan
- Staffing & Support Services, Sheridan
- State Government, Sheridan
- Stock & Bond Brokers & Dealers, Sheridan
- Stocks & Bond Brokers, Sheridan
- Stoves & Furnace Equipment, Sheridan - Fittings & Repair Parts
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