- Games & Hobbies, Seaford
- Garage, Door & Window Products, Seaford
- Garbage & Rubbish Removal, Seaford
- Garden & Lawn Sprinkler Repair, Installation & Service, Seaford
- Garment & Linen Services, Seaford
- Gas Equipment Industrial, Seaford
- Gas Station, Seaford - Service & Filling Station
- Gasoline, Seaford
- Gastroenterologists, Seaford - GI Doctors, Physicians & Surgeons (Gastroenterology)
- General Business Consulting, Seaford
- General Business Services, Seaford
- General Consultants, Seaford
- General Freight Trucking, Seaford - Motor Freight
- General Hardware Stores, Seaford
- General Merchandise Stores, Seaford
- General Surgeons, Seaford - General Surgery Doctors, Physicians & Surgeons
- General Travel Agents & Agencies, Seaford
- Geothermal Heating & Cooling Equipment, Systems & Supplies, Seaford
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- Gift Baskets, Seaford
- Gift Shops, Seaford - Gift, Novelty & Souvenir Stores
- Gifts By Type & Occasion, Seaford
- Gifts, Cards & Stationery Stores, Seaford
- Glass & Glass Products, Seaford
- Glass - Auto, Float, Plate, Window & Doors, Seaford
- Glass Products Manufacturers, Seaford
- Golf Courses, Seaford
- Gospel Church, Seaford
- Government, Seaford
- Grain Brokers, Seaford
- Graphic Design Services, Seaford - Graphic Designer
- Graphic Designer & Artist Services, Seaford
- Greeting Card Stores, Seaford
- Grocery Stores & Supermarkets, Seaford
- Ground Transportation, Except Passenger, Seaford
- Guide & Directory Advertising Services, Seaford
- Gymnastics Schools, Seaford
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