- Sandwich Shop Restaurants, Galena Park
- Satellite Dish Antennas & Equipment Dealers, Galena Park
- Satellite TV Service, Galena Park
- Scrap & Waste Materials, Galena Park
- Secondary Schools, Galena Park
- Security & Surveillance System & Equipment, Galena Park
- Security Guard & Patrol Service, Galena Park - Bodyguard, Guard Dogs, Etc
- Security Services, Galena Park
- Service Establishment Supplies & Equipment, Galena Park
- Shopping & Shopping Services, Galena Park
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- Snacks & Desserts, Galena Park
- Speciality Food Stores, Galena Park
- Specialty Stores, Galena Park
- Sprinkler Alarm Systems, Galena Park - Fire Sprinkler Systems
- Staffing & Support Services, Galena Park
- Steak House Restaurants, Galena Park
- Steel & Metal Goods, Galena Park - Steel Distributors
- Steel Manufacturers, Galena Park
- Stevedoring Contractors, Galena Park
- Sweeping Compounds, Galena Park
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