- Sand Gravel & Aggregate, Cedarville
- Savings & Loan Associations, Cedarville
- Savings Banks, Cedarville
- Sawmill & Planing Mills, Cedarville
- Sawmill Supplies & Equipment Repair, Cedarville
- Secondary Schools, Cedarville
- Security Alarm Systems - Home & Business, Cedarville
- Security Control Systems & Monitoring, Cedarville - Polygraph, Lie Detector, CCTV, Fire Sensor Equipment, Etc
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- Security Services, Cedarville
- Ship & Boat Building & Repairing, Cedarville
- Shopping & Shopping Services, Cedarville
- Ski & Snowmobile Clubs, Cedarville
- Snowmobile Dealers, Cedarville - Parts, Gear, Clothing & Accessories
- Social Services & Welfare, Cedarville
- Specialty Animal Services, Cedarville
- Specialty Stores, Cedarville
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