- Games & Hobbies, Northfield
- Garage Door Repair, Northfield
- Garage, Door & Window Products, Northfield
- Garment & Linen Services, Northfield
- Gas Companies, Northfield
- Gas Station, Northfield - Service & Filling Station
- General Business Consulting, Northfield
- General Business Services, Northfield
- General Freight Trucking, Northfield - Motor Freight
- General Hardware Stores, Northfield
- General Management Consulting Services, Northfield - Management Consultants
- General Merchandise Stores, Northfield
- General Travel Agents & Agencies, Northfield
- Gift Baskets, Northfield
- Gift Certificates, Northfield
- Gift Shops, Northfield - Gift, Novelty & Souvenir Stores
- Gifts By Type & Occasion, Northfield
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- Gifts, Cards & Stationery Stores, Northfield
- Glass & Glass Products, Northfield
- Glass - Auto, Float, Plate, Window & Doors, Northfield
- Glass Plate Windows, Northfield
- Glass, Plastic & Rubber Working Machinery, Northfield
- Gold, Silver & Platinum Buyers, Sellers & Dealers, Northfield
- Golf Courses, Northfield
- Government, Northfield
- Graphic Design Services, Northfield - Graphic Designer
- Graphic Designer & Artist Services, Northfield
- Grease Traps, Northfield
- Greek Restaurants, Northfield
- Grocery Stores & Supermarkets, Northfield
- Ground Transportation, Except Passenger, Northfield
- Gun Repair & Services, Northfield
- Guns & Gunsmith Services, Northfield
- Gutters & Downspout Cleaning & Repairing, Northfield
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