- Salvation Army, Saint Maurice
- Sand Gravel & Aggregate, Saint Maurice
- Sandblasting, Saint Maurice - General Contractors
- Sawmill & Planing Mills, Saint Maurice
- Sawmill Supplies & Equipment Repair, Saint Maurice
- Scrap & Waste Materials, Saint Maurice
- Secondary Schools, Saint Maurice
- Senior Citizens Housing, Saint Maurice
- Senior Citizens Service & Health Organizations, Saint Maurice
- Septic Tanks & Systems, Saint Maurice - Wholesale, Dealers & Suppliers
- Shopping & Shopping Services, Saint Maurice
- Snacks & Desserts, Saint Maurice
- Snow Removal Services, Saint Maurice - Snow Plow Service
- Snowmobile Dealers, Saint Maurice - Parts, Gear, Clothing & Accessories
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- Social Services & Welfare, Saint Maurice
- Societies & Foundation Associations, Saint Maurice
- Special Dies Tools Jigs & Fixtures Manufacturers, Saint Maurice
- Special Events Photographers, Saint Maurice
- Speciality Food Stores, Saint Maurice
- Specialty Stores, Saint Maurice
- Sporting Goods Stores, Saint Maurice
- Sports Clubs, Saint Maurice
- Staffing & Support Services, Saint Maurice
- Steel Fabrications Specialties, Saint Maurice
- Steel Manufacturers, Saint Maurice
- Stone & Rock Quarry, Saint Maurice - Gravel Pit, Shale, Granite, Limestone, Crushed Rock, etc
- Stoves, Ovens, Ranges & Cooktops, Saint Maurice
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