- Sandwich Shop Restaurants, Oak Island
- Satellite Dish Antennas & Equipment Dealers, Oak Island
- Savings Banks, Oak Island
- Seafood Restaurants, Oak Island
- Security Investigative Services, Oak Island
- Security Services, Oak Island
- Senior Citizens Service & Health Organizations, Oak Island
- Shopping & Shopping Services, Oak Island
- Snacks & Desserts, Oak Island
- Social Services & Welfare, Oak Island
- Societies & Foundation Associations, Oak Island
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- Soup & Salad Restaurants, Oak Island
- Specialty Stores, Oak Island
- Sporting Goods Stores, Oak Island
- Sports & Recreational Services, Oak Island
- Staffing & Support Services, Oak Island
- Steak House Restaurants, Oak Island
- Submarine Sandwich Restaurants, Oak Island
- Surfboard & Windsurfing Equipment Shops, Oak Island
- Surveyor Services, Oak Island - Surveying Service
- Swimwear & Accessories Shops, Oak Island - Water Sports Equipment
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