- Sales & Marketing Consultant, Johnstown
- Sales Promotion Service, Johnstown
- Sandwich Shop Restaurants, Johnstown
- Satellite Descrambling & Programming Service, Johnstown
- Satellite Dish Antennas & Equipment Dealers, Johnstown
- Satellite TV Service, Johnstown
- Science & Research, Johnstown
- Scientific & Laboratory Equipment & Instruments, Johnstown
- Screen Printing, Johnstown
- Seafood Restaurants, Johnstown
- Secondary Schools, Johnstown
- Security Alarm Systems - Home & Business, Johnstown
- Security Brokers & Dealers, Johnstown
- Security Control Systems & Monitoring, Johnstown - Polygraph, Lie Detector, CCTV, Fire Sensor Equipment, Etc
- Security Services, Johnstown
- Senior Citizens Service & Health Organizations, Johnstown
- Shipping Service, Johnstown
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- Shopping & Shopping Services, Johnstown
- Snow Removal Services, Johnstown - Snow Plow Service
- Social Services & Welfare, Johnstown
- Special Interest Schools Or Instruction, Johnstown
- Specialty Stores, Johnstown
- Sporting Goods Stores, Johnstown
- Staffing & Support Services, Johnstown
- State Government, Johnstown
- Stocks & Bond Brokers, Johnstown
- Storage Containers, Johnstown
- Substance Abuse Clinics, Johnstown - Alcoholism, Addiction & Drug Abuse Treatment Centers
- Surgical Hospitals, Johnstown - Surgical Centers
- Swimming Pool, Sauna & Spa Contractors, Johnstown
- Swimming Pools Contractors, Johnstown - Install Inground - Above Ground Pools
- Swimming Pools Repair, Service, Supplies, Sale & Installation, Johnstown
- Swimming Pools Supplies, Equipment & Accessories, Johnstown
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