- Sand Gravel & Aggregate, Didsbury
- Sandblasting, Didsbury - General Contractors
- Sandwich Shop Restaurants, Didsbury
- Scientific Equipment & Services, Didsbury
- Scientific Equipment & Supplies, Didsbury
- Secondary Schools, Didsbury
- Security & Commodity Brokers, Didsbury
- Senior Citizens Housing, Didsbury
- Senior Citizens Service & Health Organizations, Didsbury
- Septic Systems Installation & Repair, Didsbury
- Septic Tanks & Septic Systems Contractors, Didsbury - Installation, Repair, Service, Cleaning & Pumping Septic Tanks
- Sheet Metal Contractors, Didsbury - Sheet Metal Fabrication
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- Sheet Metal Fabricators & Ductwork Contractors, Didsbury
- Shopping & Shopping Services, Didsbury
- Siding Materials, Didsbury
- Social Service Organizations Volunteer Services, Didsbury
- Social Services & Welfare, Didsbury
- Societies & Foundation Associations, Didsbury
- Sod & Sodding Service, Didsbury
- Solar Equipment, Didsbury
- Special Interest Schools Or Instruction, Didsbury
- Specialty Animal Services, Didsbury
- Specialty Stores, Didsbury
- Sulphur Mining, Didsbury
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