- Sandwich Shop Restaurants, Northford
- Savings Banks, Northford
- Scientific Equipment & Services, Northford
- Scientific Services, Northford
- Sealcoating, Northford - Asphalt Sealcoating & Paving
- Security Services, Northford
- Shopping & Shopping Services, Northford
- Signs, Northford
- Skating Rink & Hockey Operation Services, Northford
- Snacks & Desserts, Northford
- Social Services & Welfare, Northford
|
- Special Interest Schools Or Instruction, Northford
- Specialty Stores, Northford
- Sporting Goods Stores, Northford
- Steam Cleaning Residential, Northford
- Substance Abuse Clinics, Northford - Alcoholism, Addiction & Drug Abuse Treatment Centers
- Surveyor Services, Northford - Surveying Service
- Swimming Pool, Sauna & Spa Contractors, Northford
- Swimming Pools Contractors, Northford - Install Inground - Above Ground Pools
- Swimming Pools Repair, Service, Supplies, Sale & Installation, Northford
- Swimming Pools Supplies, Equipment & Accessories, Northford
|