- Safe & Vault, West Hartford
- Sales & Marketing Consultant, West Hartford
- Sandblasting, West Hartford - General Contractors
- Sandwich Shop Restaurants, West Hartford
- Satellite & Cable TV Equipment & Systems Repair & Service, West Hartford
- Satellite Descrambling & Programming Service, West Hartford
- Satellite Dish Antennas & Equipment Dealers, West Hartford
- Satellite TV Service, West Hartford
- Scholarships & Financial Aid, West Hartford
- School Bus Transportation Service, West Hartford
- Scientific Equipment & Services, West Hartford
- Scientific Services, West Hartford
- Scrap & Waste Machinery, West Hartford
- Scrap & Waste Materials, West Hartford
- Screen Printing, West Hartford
- Seafood Restaurants, West Hartford
- Secondary Schools, West Hartford
- Security & Surveillance System & Equipment, West Hartford
- Security Alarm Systems - Home & Business, West Hartford
- Security Brokers & Dealers, West Hartford
- Security Control Systems & Monitoring, West Hartford - Polygraph, Lie Detector, CCTV, Fire Sensor Equipment, Etc
- Security Services, West Hartford
- Senior Citizens Information & Services, West Hartford
- Senior Citizens Service & Health Organizations, West Hartford
- Sewer & Drain Cleaning & Repair, West Hartford - Drain Cleaner & Installation Services
- Sewing & Yarn Stores & Supplies, West Hartford
- Sheet Metal Contractors, West Hartford - Sheet Metal Fabrication
- Sheet Metal Fabricators & Ductwork Contractors, West Hartford
- Shish Kebab Restaurants, West Hartford
- Shoe Dyers, West Hartford
- Shoe Repair Shops, West Hartford
- Shoe Stores, West Hartford - Mens, Womens & Kids Shoes
- Shopping & Shopping Services, West Hartford
- Siding Contractors, West Hartford - Vinyl Siding, Wood, Metal & Aluminum Siding Contractors - Installation & Repair
- Signs, West Hartford
- Silversmiths & Goldsmiths, West Hartford
- Silverware & Plated Ware, West Hartford
- Site Planners, West Hartford
- Skating Rink & Hockey Operation Services, West Hartford
- Skin Care & Cosmetology Salons, West Hartford
- Skin Care Products & Treatments, West Hartford
- Sleep Disorders Treatment & Information Centers, West Hartford
- Small Appliances, West Hartford
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- Snacks & Desserts, West Hartford
- Snow Removal Services, West Hartford - Snow Plow Service
- Soccer Clubs, West Hartford
- Social Clubs & Organizations, West Hartford
- Social Security And Disability Attorneys & Lawyers, West Hartford
- Social Security And Disability Lawyers & Attorneys, West Hartford
- Social Services & Welfare, West Hartford
- Social Workers & Services, West Hartford
- Societies & Foundation Associations, West Hartford
- Special Education & Care, West Hartford
- Special Events & Party Supply Rental, West Hartford
- Special Interest Schools Or Instruction, West Hartford
- Special Needs Transportation, West Hartford
- Speciality Food Stores, West Hartford
- Specialty Animal Services, West Hartford
- Specialty Stores, West Hartford
- Speech & Hearing Specialists, West Hartford
- Speech Pathologists, West Hartford - Speech & Language Therapy
- Sporting Goods Equipment Rental, West Hartford
- Sporting Goods Stores, West Hartford
- Sports & Recreational Services, West Hartford
- Sports Information Services, West Hartford
- Sportswear Clothing Stores, West Hartford - Sports Clothes
- Staffing & Support Services, West Hartford
- Stainless Steel, West Hartford
- Stamp Collecting & Coin Dealers , West Hartford
- State Government, West Hartford
- Stationery & Office Supplies, West Hartford
- Steak House Restaurants, West Hartford
- Steel & Metal Goods, West Hartford - Steel Distributors
- Stock & Bond Brokers & Dealers, West Hartford
- Stocks & Bond Brokers, West Hartford
- Storage & Closet Equipment Supplies & Materials, West Hartford
- Storage Systems & Closet Organizers, West Hartford
- Stove, Oven, Range & Cooktop Parts & Supplies, West Hartford
- Stoves & Furnace Equipment, West Hartford - Fittings & Repair Parts
- Structural Engineer, West Hartford
- Surgical Hospitals, West Hartford - Surgical Centers
- Surveyor Services, West Hartford - Surveying Service
- Surveyors, West Hartford
- Sushi Restaurants, West Hartford
- Swimming Lessons & Classes, West Hartford
- Synagogues & Temples, West Hartford
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