- Safety Equipment & Supplies, Newington
- Sales & Marketing Consultant, Newington
- Sand Gravel & Aggregate, Newington
- Sandwich Shop Restaurants, Newington
- Scientific Equipment & Services, Newington
- Scientific Services, Newington
- Scrap & Waste Machinery, Newington
- Scrap & Waste Materials, Newington
- Screen Printing, Newington
- Seafood Restaurants, Newington
- Sealants Retail, Newington
- Sealcoating, Newington - Asphalt Sealcoating & Paving
- Search & Navigation Equipment Manufacturers, Newington
- Secondary Schools, Newington
- Security Alarm Systems - Home & Business, Newington
- Security Brokers & Dealers, Newington
- Security Control Systems & Monitoring, Newington - Polygraph, Lie Detector, CCTV, Fire Sensor Equipment, Etc
- Security Investigative Services, Newington
- Security Services, Newington
- Self Defense Programs, Newington
- Senior Citizens Service & Health Organizations, Newington
- Sewer & Drain Cleaning & Repair, Newington - Drain Cleaner & Installation Services
- Sewer Construction Contractors, Newington - Sewer Line, Pipe Installation & Repair Services
- Sewing & Yarn Stores & Supplies, Newington
- Sewing Machine Repair & Service, Newington
- Sewing Machines, Equipment & Supplies, Newington
- Sheet Metal, Newington
- Sheet Metal Contractors, Newington - Sheet Metal Fabrication
- Sheet Metal Fabricators & Ductwork Contractors, Newington
- Shirts & T-Shirts, Newington
- Shoe Store - More, Newington
- Shoe Stores, Newington - Mens, Womens & Kids Shoes
- Shopping & Shopping Services, Newington
- Siding Contractors, Newington - Vinyl Siding, Wood, Metal & Aluminum Siding Contractors - Installation & Repair
- Signs, Newington
- Skin Care & Cosmetology Salons, Newington
- Skin Care Products & Treatments, Newington
- Skylights, Newington - Skylight Shades, Blinds, Covers & More
- Slate, Newington
- Sleep Disorders Treatment & Information Centers, Newington
- Small Appliances, Newington
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- Snacks & Desserts, Newington
- Snow Removal Services, Newington - Snow Plow Service
- Social Services & Welfare, Newington
- Societies & Foundation Associations, Newington
- Sod & Sodding Service, Newington
- Solar Products & Services, Newington
- Solariums & Garden Rooms, Newington
- Sound Systems, Microphones & Equipment, Newington
- Special Dies Tools Jigs & Fixtures Manufacturers, Newington
- Special Interest Schools Or Instruction, Newington
- Specialty Animal Services, Newington
- Specialty Stores, Newington
- Specialty Wall Finishes, Newington
- Sporting Goods Equipment Rental, Newington
- Sporting Goods Stores, Newington
- Sports Bars & Lounges, Newington
- Sports Officiating Services, Newington
- Sportswear Clothing Stores, Newington - Sports Clothes
- Sprinkler System Contractors, Newington - Garden & Lawn Sprinkler System Installation & Repair
- Stadiums, Arenas, Coliseums & Athletic Fields, Newington
- Staffing & Support Services, Newington
- Staircases Stairs & Railings, Newington
- Stamp Collecting & Coin Dealers , Newington
- State Government, Newington
- Stationery & Office Supplies, Newington
- Steak House Restaurants, Newington
- Steel & Metal Goods, Newington - Steel Distributors
- Steel Bar Sheet Strip Tube Etcetera Manufacturers, Newington
- Steel Manufacturers, Newington
- Stereo, Audio & Video Equipment Dealers & Stores, Newington
- Stocks & Bond Brokers, Newington
- Stucco Siding Contractors, Newington - Stucco Repair & Installation
- Stucco Siding, Granite & Grouting Contractors, Newington
- Submarine Sandwich Restaurants, Newington
- Surgical Hospitals, Newington - Surgical Centers
- Sushi Restaurants, Newington
- Swimming Pool, Sauna & Spa Contractors, Newington
- Swimming Pools Contractors, Newington - Install Inground - Above Ground Pools
- Swimming Pools Repair, Service, Supplies, Sale & Installation, Newington
- Swimming Pools Supplies, Equipment & Accessories, Newington
- Synagogues & Temples, Newington
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