- Sandwich Shop Restaurants, Wellsville
- Secondary Schools, Wellsville
- Security & Surveillance System & Equipment, Wellsville
- Security Brokers & Dealers, Wellsville
- Security Services, Wellsville
- Septic Tank Pumping & Cleaning, Wellsville - Septic Systems
- Sewer & Drain Cleaning & Repair, Wellsville - Drain Cleaner & Installation Services
- Sewer Construction Contractors, Wellsville - Sewer Line, Pipe Installation & Repair Services
- Shoe Store - More, Wellsville
- Shoe Stores, Wellsville - Mens, Womens & Kids Shoes
- Shopping & Shopping Services, Wellsville
- Skating Rink & Hockey Operation Services, Wellsville
|
- Social Clubs & Organizations, Wellsville
- Social Service Organizations Mental Health Services, Wellsville
- Social Services & Welfare, Wellsville
- Societies & Foundation Associations, Wellsville
- Specialty Stores, Wellsville
- Speech & Hearing Specialists, Wellsville
- Sporting Goods Stores, Wellsville
- Sports Bars & Lounges, Wellsville
- State Government, Wellsville
- Stationery & Office Supplies, Wellsville
- Surveyor Services, Wellsville - Surveying Service
- Surveyors, Wellsville
|
