- Sales & Marketing Consultant, Ellenville
- Salvage Yards, Junk Yards & Wrecker Service, Ellenville
- Sand Gravel & Aggregate, Ellenville
- Sandwich Shop Restaurants, Ellenville
- Seafood Restaurants, Ellenville
- Secondary Schools, Ellenville
- Security & Surveillance System & Equipment, Ellenville
- Security Services, Ellenville
- Senior Citizens Information & Services, Ellenville
- Service & Gas Station Equipment & Services, Ellenville
- Sewer & Drain Cleaning & Repair, Ellenville - Drain Cleaner & Installation Services
- Shopping & Shopping Services, Ellenville
- Snacks & Desserts, Ellenville
- Social Clubs & Organizations, Ellenville
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- Social Services & Welfare, Ellenville
- Social Workers & Services, Ellenville
- Societies & Foundation Associations, Ellenville
- Special Interest Schools Or Instruction, Ellenville
- Specialty Stores, Ellenville
- Sporting & Recreational Camps, Ellenville
- Sporting Goods Stores, Ellenville
- Surgical Supplies & Equipment, Ellenville
- Surgical Supplies, Instruments, Tools & Equipment, Ellenville
- Surveyor Services, Ellenville - Surveying Service
- Surveyors, Ellenville
- Swimming Pools, Ellenville
- Synagogues & Temples, Ellenville
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