- Games & Hobbies, Amityville
- Garage Building & Repair, Amityville - Carports - Garage Builders
- Garage Door Repair, Amityville
- Garage Doors & Door Operating Devices, Amityville
- Garage Doors & Gates, Amityville - Stores & Companies - Install & Repair Services
- Garage, Door & Window Products, Amityville
- Garbage & Rubbish Removal, Amityville
- Garden & Lawn Sprinkler Repair, Installation & Service, Amityville
- Garment & Linen Services, Amityville
- Gas & Air Compressors, Amityville
- Gas Engine, Amityville
- Gas Station, Amityville - Service & Filling Station
- General Business Consulting, Amityville
- General Business Services, Amityville
- General Consultants, Amityville
- General Freight Trucking, Amityville - Motor Freight
- General Management Consulting Services, Amityville - Management Consultants
- General Merchandise Stores, Amityville
- General Travel Agents & Agencies, Amityville
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- Generator Repair, Amityville
- Generator Sales & Rental, Amityville - Contractors Supplies & Equipment
- Generators, Amityville - Solar, Steam, Wind Power, etc
- Generators, Compressors, Pumps, Motors & Fans, Amityville
- Gift Baskets, Amityville
- Gift Wrapping Service, Amityville
- Gifts By Type & Occasion, Amityville
- Gifts, Cards & Stationery Stores, Amityville
- Glass & Glass Products, Amityville
- Glass & Glazing Contractors, Amityville
- Glass - Auto, Float, Plate, Window & Doors, Amityville
- Glass Tinting & Coating, Amityville - Home - Car Window Tinting
- Go Kart Tracks, Amityville
- Government, Amityville
- Graphic Designer & Artist Services, Amityville
- Greek Restaurants, Amityville
- Grocery Stores & Supermarkets, Amityville
- Ground Transportation, Except Passenger, Amityville
- Gymnastics Schools, Amityville
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