- Safe & Vault, Fox Lake
- Sandwich Shop Restaurants, Fox Lake
- Savings Banks, Fox Lake
- Scrap & Waste Machinery, Fox Lake
- Scrap & Waste Materials, Fox Lake
- Sealcoating, Fox Lake - Asphalt Sealcoating & Paving
- Secondary Schools, Fox Lake
- Security Alarm Systems - Home & Business, Fox Lake
- Security Brokers & Dealers, Fox Lake
- Security Control Systems & Monitoring, Fox Lake - Polygraph, Lie Detector, CCTV, Fire Sensor Equipment, Etc
- Security Services, Fox Lake
- Senators Elected, Fox Lake
- Senior Citizens Service & Health Organizations, Fox Lake
- Ship & Boat Building & Repairing, Fox Lake
- Shopping & Shopping Services, Fox Lake
- Signs, Fox Lake
- Snacks & Desserts, Fox Lake
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- Snow Removal Services, Fox Lake - Snow Plow Service
- Social Clubs & Organizations, Fox Lake
- Social Services & Welfare, Fox Lake
- Special Events & Party Supply Rental, Fox Lake
- Specialty Stores, Fox Lake
- Sporting Goods Stores, Fox Lake
- Staffing & Support Services, Fox Lake
- Stamp Collecting & Coin Dealers , Fox Lake
- State Administrative Agencies, Fox Lake
- State Government, Fox Lake
- Stocks & Bond Brokers, Fox Lake
- Surveyor Services, Fox Lake - Surveying Service
- Swimming Pool, Sauna & Spa Contractors, Fox Lake
- Swimming Pools Contractors, Fox Lake - Install Inground - Above Ground Pools
- Swimming Pools Repair, Service, Supplies, Sale & Installation, Fox Lake
- Swimming Pools Supplies, Equipment & Accessories, Fox Lake
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