- Safe Deposit Box Services, Louisburg
- Safe, Lock & Key Repair Services, Louisburg - Safes & Vaults Opening & Repair
- Safety & Security Systems & Consultants, Louisburg
- Sand Gravel & Aggregate, Louisburg
- Sandwich Shop Restaurants, Louisburg
- Savings Banks, Louisburg
- Sawmill & Planing Mills, Louisburg
- Sawmill Supplies & Equipment Repair, Louisburg
- School - Christian, Louisburg
- Screen Printing, Louisburg
- Sealcoating, Louisburg - Asphalt Sealcoating & Paving
- Secondary Schools, Louisburg
- Security Brokers & Dealers, Louisburg
- Seeds & Bulbs Wholesale & Growers, Louisburg
- Septic Tank Pumping & Cleaning, Louisburg - Septic Systems
- Sheriff's Department, Louisburg
- Shoe Stores, Louisburg - Mens, Womens & Kids Shoes
- Shopping & Shopping Services, Louisburg
- Signs, Louisburg
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- Snacks & Desserts, Louisburg
- Social Services & Welfare, Louisburg
- Societies & Foundation Associations, Louisburg
- Special Education & Care, Louisburg
- Speciality Food Stores, Louisburg
- Specialty Animal Services, Louisburg
- Specialty Communication Companies & Services, Louisburg
- Specialty Stores, Louisburg
- Speech & Hearing Specialists, Louisburg
- Speech Pathologists, Louisburg - Speech & Language Therapy
- Sporting Goods Stores, Louisburg
- Staffing & Support Services, Louisburg
- State Government, Louisburg
- Steel Manufacturers, Louisburg
- Stocks & Bond Brokers, Louisburg
- Stone Setting Contractors, Louisburg
- Structural Engineer, Louisburg
- Surveyor Services, Louisburg - Surveying Service
- Surveyors, Louisburg
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