- Salvage Yards, Houghton - Auto, Motorcycle, Boat, Trucks, etc
- Sand Gravel & Aggregate, Houghton
- Sandwich Shop Restaurants, Houghton
- Satellite Dish Antennas & Equipment Dealers, Houghton
- Savings Banks, Houghton
- Screen Printing, Houghton
- Seafood Restaurants, Houghton
- Secondary Schools, Houghton
- Security Alarm Systems - Home & Business, Houghton
- Security Brokers & Dealers, Houghton
- Security Control Systems & Monitoring, Houghton - Polygraph, Lie Detector, CCTV, Fire Sensor Equipment, Etc
- Security Services, Houghton
- Septic Tanks & Septic Systems Contractors, Houghton - Installation, Repair, Service, Cleaning & Pumping Septic Tanks
- Sewer Companies, Houghton
- Sewing & Yarn Stores & Supplies, Houghton
- Sewing Machine Repair & Service, Houghton
- Sewing Machines, Equipment & Supplies, Houghton
- Sharpening Service, Houghton
- Shirts & T-Shirts, Houghton
- Shock Absorber, Houghton
- Shock Absorbers & Struts, Houghton
- Shoe Repair Shops, Houghton
- Shoe Store - More, Houghton
- Shoe Stores, Houghton - Mens, Womens & Kids Shoes
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- Shopping & Shopping Services, Houghton
- Signs, Houghton
- Ski Centers, Houghton
- Ski Resorts, Houghton
- Small Appliances, Houghton
- Snacks & Desserts, Houghton
- Snow Removal Services, Houghton - Snow Plow Service
- Snowmobile Dealers, Houghton - Parts, Gear, Clothing & Accessories
- Snowmobile Equipment & Supplies, Houghton
- Social Security Counselors & Representatives, Houghton
- Social Services & Welfare, Houghton
- Sororities, Houghton
- Special Interest Schools Or Instruction, Houghton
- Special Needs Transportation, Houghton
- Specialty Stores, Houghton
- Sporting Goods Stores, Houghton
- Sports Medicine, Houghton - Doctors, Physicians & Surgeons
- State Government, Houghton
- Steak House Restaurants, Houghton
- Stocks & Bond Brokers, Houghton
- Substance Abuse Clinics, Houghton - Alcoholism, Addiction & Drug Abuse Treatment Centers
- Surplus & Salvage Merchandise, Houghton
- Surveyor Services, Houghton - Surveying Service
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