- Gambling & Lottery Services, Belleville
- Games & Hobbies, Belleville
- Garage Doors & Door Operating Devices, Belleville
- Garage Doors & Gates, Belleville - Stores & Companies - Install & Repair Services
- Garage, Door & Window Products, Belleville
- Garbage & Rubbish Removal, Belleville
- Garment & Linen Services, Belleville
- Gas & Other Services Combined, Belleville
- Gas Appliance Repair, Maintenance & Service, Belleville
- Gas Companies, Belleville
- Gas Engine, Belleville
- Gas Equipment Industrial, Belleville
- Gas Line Installation Contractors, Belleville - Gas Pipe Installation - Repair Service
- Gas Piping Contractors, Belleville - Gas Pipe Installation & Repair Service
- Gas Station, Belleville - Service & Filling Station
- Gasket, Belleville - Supply & Wholesale - Gaskets, Packing & Sealing Device
- Gazebo Builders, Belleville - Installation, Repair & Maintenance Services
- Gemologists & Jewelers, Belleville
- Genealogy, Belleville
- General Business Consulting, Belleville
- General Business Services, Belleville
- General Consultants, Belleville
- General Freight Trucking, Belleville - Motor Freight
- General Hardware Stores, Belleville
- General Management Consulting Services, Belleville - Management Consultants
- General Merchandise Stores, Belleville
- General Travel Agents & Agencies, Belleville
- Generators, Compressors, Pumps, Motors & Fans, Belleville
- Geosynthetics, Belleville
- Geothermal Heating & Cooling Contractors, Belleville - Geothermal HVAC - Installation
- Gift Baskets, Belleville
- Gift Shops, Belleville - Gift, Novelty & Souvenir Stores
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- Gifts By Type & Occasion, Belleville
- Gifts, Cards & Stationery Stores, Belleville
- Glass & Glass Products, Belleville
- Glass & Glazing Contractors, Belleville
- Glass - Auto, Float, Plate, Window & Doors, Belleville
- Glass Stained & Leaded, Belleville
- Glass Tinting & Coating, Belleville - Home - Car Window Tinting
- Gloves Retail, Belleville
- Gold, Silver & Platinum Buyers, Sellers & Dealers, Belleville
- Golf Courses, Belleville
- Golf Driving Ranges, Belleville
- Golf Equipment & Supplies Stores, Belleville - Golf Clubs, Balls, Carts, Bags, Apparel, Shoes & Accessories
- Goodyear Tires, Belleville - Dealers
- Gourmet Food Stores, Belleville
- Government, Belleville
- Graffiti Removal & Protection Services, Belleville
- Granite, Belleville
- Graphic Design Services, Belleville - Graphic Designer
- Graphic Designer & Artist Services, Belleville
- Greek Churches, Belleville
- Greek Restaurants, Belleville
- Greeting Card Stores, Belleville
- Grills & Grilling Equipment & Supplies, Belleville
- Grocery Stores & Supermarkets, Belleville
- Ground Transportation, Except Passenger, Belleville
- Guide & Directory Advertising Services, Belleville
- Gun & Hunting & Fishing Clubs, Belleville
- Gun Repair & Services, Belleville
- Guns & Gunsmith Services, Belleville
- Gutter & Flashing Contractors, Belleville - Metal - Copper Flashing - Gutter Cleaning & Repair Services
- Gymnastic Clubs, Belleville
- Gymnastics Equipment & Supplies, Belleville
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