- Sandwich Shop Restaurants, Winslow
- Satellite Descrambling & Programming Service, Winslow
- Satellite TV Service, Winslow
- Savings Banks, Winslow
- Screen Printing, Winslow
- Secondary Schools, Winslow
- Senior Citizens Service & Health Organizations, Winslow
- Septic Tank Pumping & Cleaning, Winslow - Septic Systems
- Sewer & Drain Cleaning & Repair, Winslow - Drain Cleaner & Installation Services
- Shirts & T-Shirts, Winslow
- Shopping & Shopping Services, Winslow
- Sightseeing Tours, Winslow
- Snacks & Desserts, Winslow
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- Social Services & Welfare, Winslow
- Special Education & Care, Winslow
- Speciality Food Stores, Winslow
- Specialty Animal Services, Winslow
- Specialty Stores, Winslow
- Speech & Hearing Specialists, Winslow
- Speech Pathologists, Winslow - Speech & Language Therapy
- Sporting Goods Stores, Winslow
- Staffing & Support Services, Winslow
- State Government, Winslow
- State Parks, Winslow
- Support Services, Winslow
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