- Games & Hobbies, Sag Harbor
- Garage, Door & Window Products, Sag Harbor
- Garbage & Rubbish Removal, Sag Harbor
- Garden & Lawn Sprinkler Repair, Installation & Service, Sag Harbor
- Garment & Linen Services, Sag Harbor
- Gas Station, Sag Harbor - Service & Filling Station
- General Business Consulting, Sag Harbor
- General Business Services, Sag Harbor
- General Management Consulting Services, Sag Harbor - Management Consultants
- General Merchandise Stores, Sag Harbor
- Gift Baskets, Sag Harbor
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- Gift Shops, Sag Harbor - Gift, Novelty & Souvenir Stores
- Gifts By Type & Occasion, Sag Harbor
- Gifts, Cards & Stationery Stores, Sag Harbor
- Golf Clubs Private, Sag Harbor
- Golf Courses, Sag Harbor
- Gourmet Food Stores, Sag Harbor
- Government, Sag Harbor
- Graphic Design Services, Sag Harbor - Graphic Designer
- Graphic Designer & Artist Services, Sag Harbor
- Grocery Stores & Supermarkets, Sag Harbor
- Ground Transportation, Except Passenger, Sag Harbor
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