- Salvage Yards, Willow Springs - Auto, Motorcycle, Boat, Trucks, etc
- Sandwich Shop Restaurants, Willow Springs
- Savings Banks, Willow Springs
- Secondary Schools, Willow Springs
- Security Services, Willow Springs
- Sewing & Yarn Stores & Supplies, Willow Springs
- Shopping & Shopping Services, Willow Springs
- Snack Foods, Willow Springs
- Social Services & Welfare, Willow Springs
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- Societies & Foundation Associations, Willow Springs
- Specialty Stores, Willow Springs
- Stairs & Railings Contractors, Willow Springs - Metal & Wood Stairs, Spiral Staircase & Stair Railing - Installation & Repair
- Stairs, Balcony, Terrace & Steeple Contractors, Willow Springs
- State Government, Willow Springs
- Stone & Rock Quarry, Willow Springs - Gravel Pit, Shale, Granite, Limestone, Crushed Rock, etc
- Stoves & Furnace Equipment, Willow Springs - Fittings & Repair Parts
- Submarine Sandwich Restaurants, Willow Springs
- Swimming Pools, Willow Springs
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