- Games & Hobbies, Katonah
- Garage Door Repair, Katonah
- Garage, Door & Window Products, Katonah
- Garden & Lawn Sprinkler Repair, Installation & Service, Katonah
- Garment & Linen Services, Katonah
- Gas Station, Katonah - Service & Filling Station
- General Business Consulting, Katonah
- General Business Services, Katonah
- General Consultants, Katonah
- General Merchandise Stores, Katonah
- General Travel Agents & Agencies, Katonah
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- Generators, Compressors, Pumps, Motors & Fans, Katonah
- Gift Baskets, Katonah
- Gifts By Type & Occasion, Katonah
- Gifts, Cards & Stationery Stores, Katonah
- Government, Katonah
- Grape Vineyards, Katonah
- Graphic Design Services, Katonah - Graphic Designer
- Graphic Designer & Artist Services, Katonah
- Grills & Grilling Equipment & Supplies, Katonah
- Grocery Stores & Supermarkets, Katonah
- Guide & Directory Advertising Services, Katonah
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