- Sales & Marketing Consultant, Amherstburg
- Salvation Army, Amherstburg
- Sandwich Shop Restaurants, Amherstburg
- Satellite & Cable TV Equipment & Systems Repair & Service, Amherstburg
- Scrap & Waste Materials, Amherstburg
- Scrapbooks & Scrapbook Supplies, Amherstburg
- Screen Printing, Amherstburg
- Secondary Schools, Amherstburg
- Security & Surveillance System & Equipment, Amherstburg
- Security Brokers & Dealers, Amherstburg
- Senior Citizens Housing, Amherstburg
- Senior Citizens Service & Health Organizations, Amherstburg
- Septic Systems Installation & Repair, Amherstburg
- Septic Tank Pumping & Cleaning, Amherstburg - Septic Systems
- Septic Tanks & Septic Systems Contractors, Amherstburg - Installation, Repair, Service, Cleaning & Pumping Septic Tanks
- Service Establishment Supplies & Equipment, Amherstburg
- Sewer Construction Contractors, Amherstburg - Sewer Line, Pipe Installation & Repair Services
- Sheet Metal Contractors, Amherstburg - Sheet Metal Fabrication
- Sheet Metal Fabricators & Ductwork Contractors, Amherstburg
- Shoe Repair Shops, Amherstburg
- Shopping & Shopping Services, Amherstburg
- Siding Contractors, Amherstburg - Vinyl Siding, Wood, Metal & Aluminum Siding Contractors - Installation & Repair
- Signs, Amherstburg
- Small Appliances, Amherstburg
- Smoked Meat Restaurants, Amherstburg
- Smoking Cessation Treatment Centers & Information Services, Amherstburg
- Snacks & Desserts, Amherstburg
- Snow Removal Services, Amherstburg - Snow Plow Service
- Social Services & Welfare, Amherstburg
- Societies & Foundation Associations, Amherstburg
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- Sod & Sodding Service, Amherstburg
- Special Dies Tools Jigs & Fixtures Manufacturers, Amherstburg
- Special Events Photographers, Amherstburg
- Special Interest Schools Or Instruction, Amherstburg
- Speciality Food Stores, Amherstburg
- Specialty Animal Services, Amherstburg
- Specialty Stores, Amherstburg
- Speech & Hearing Specialists, Amherstburg
- Sporting Goods Stores, Amherstburg
- Sports Bars & Lounges, Amherstburg
- Stadiums, Arenas, Coliseums & Athletic Fields, Amherstburg
- Staffing & Support Services, Amherstburg
- Steel Manufacturers, Amherstburg
- Stock & Bond Brokers & Dealers, Amherstburg
- Stocks & Bond Brokers, Amherstburg
- Stone & Rock Quarry, Amherstburg - Gravel Pit, Shale, Granite, Limestone, Crushed Rock, etc
- Stoves & Furnace Equipment, Amherstburg - Fittings & Repair Parts
- Stucco Siding Contractors, Amherstburg - Stucco Repair & Installation
- Stucco Siding, Granite & Grouting Contractors, Amherstburg
- Submarine Sandwich Restaurants, Amherstburg
- Substance Abuse Outpatient Clinics, Amherstburg
- Sunroom & Solarium Construction Contractors, Amherstburg
- Surveyor Services, Amherstburg - Surveying Service
- Sushi Restaurants, Amherstburg
- Sweepers & Scrubbers Industrial, Amherstburg - Sweeping Service
- Swimming Pool, Sauna & Spa Contractors, Amherstburg
- Swimming Pools Contractors, Amherstburg - Install Inground - Above Ground Pools
- Swimming Pools Repair, Service, Supplies, Sale & Installation, Amherstburg
- Swimming Pools Supplies, Equipment & Accessories, Amherstburg
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