- Safety Training Schools, Carpentersville
- Sales & Marketing Consultant, Carpentersville
- Sandwich Shop Restaurants, Carpentersville
- Satellite Dish Antennas & Equipment Dealers, Carpentersville
- Satellite TV Service, Carpentersville
- Sawmill, Paper & Woodworking Supplies, Machinery & Equipment, Carpentersville
- Scientific Equipment & Services, Carpentersville
- Scientific Equipment & Supplies, Carpentersville
- Screen Printing, Carpentersville
- Secondary Schools, Carpentersville
- Secretarial & Court Reporting Services, Carpentersville
- Security Brokers & Dealers, Carpentersville
- Security Guard & Patrol Service, Carpentersville - Bodyguard, Guard Dogs, Etc
- Security Services, Carpentersville
- Semiconductors & Equipment, Carpentersville
- Sewer & Drain Cleaning & Repair, Carpentersville - Drain Cleaner & Installation Services
- Sewing Machines, Equipment & Supplies, Carpentersville
- Sheet Metal Contractors, Carpentersville - Sheet Metal Fabrication
- Sheet Metal Fabricators & Ductwork Contractors, Carpentersville
- Shoe Stores, Carpentersville - Mens, Womens & Kids Shoes
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- Shopping & Shopping Services, Carpentersville
- Short Term Business Credit Institutions, Carpentersville
- Sign Equipment & Supplies, Carpentersville
- Sign Products & Services, Carpentersville
- Signs, Carpentersville
- Small Appliances, Carpentersville
- Snacks & Desserts, Carpentersville
- Social Services & Welfare, Carpentersville
- Special Coatings, Carpentersville - Protective Coatings
- Special Interest Schools Or Instruction, Carpentersville
- Specialty Stores, Carpentersville
- Sporting Goods Stores, Carpentersville
- Staffing & Support Services, Carpentersville
- State Administrative Agencies, Carpentersville
- State Government, Carpentersville
- Steel Manufacturers, Carpentersville
- Stitching Services, Carpentersville
- Stone & Rock Quarry, Carpentersville - Gravel Pit, Shale, Granite, Limestone, Crushed Rock, etc
- Sushi Restaurants, Carpentersville
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