- Games & Hobbies, Mattoon
- Garage Building & Repair, Mattoon - Carports - Garage Builders
- Garage Door Repair, Mattoon
- Garage Doors & Door Operating Devices, Mattoon
- Garage Doors & Gates, Mattoon - Stores & Companies - Install & Repair Services
- Garage, Door & Window Products, Mattoon
- Garbage & Rubbish Removal, Mattoon
- Garment & Linen Services, Mattoon
- Gas Engine, Mattoon
- Gas Station, Mattoon - Service & Filling Station
- General Business Services, Mattoon
- General Hardware Stores, Mattoon
- General Merchandise Stores, Mattoon
- General Travel Agents & Agencies, Mattoon
- Generator Sales & Rental, Mattoon - Contractors Supplies & Equipment
- Generators, Compressors, Pumps, Motors & Fans, Mattoon
- Geothermal Heating & Cooling Equipment, Systems & Supplies, Mattoon
- Gift Shops, Mattoon - Gift, Novelty & Souvenir Stores
- Gifts, Cards & Stationery Stores, Mattoon
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- Glass & Glass Products, Mattoon
- Glass & Glazing Contractors, Mattoon
- Glass - Auto, Float, Plate, Window & Doors, Mattoon
- Glass Tinting & Coating, Mattoon - Home - Car Window Tinting
- Gold, Silver & Platinum Buyers, Sellers & Dealers, Mattoon
- Golf Clubs Private, Mattoon
- Golf Courses, Mattoon
- Golf Equipment & Supplies Stores, Mattoon - Golf Clubs, Balls, Carts, Bags, Apparel, Shoes & Accessories
- Golf Equipment Repair & Sales, Mattoon - Clubs, Carts, Bags & More
- Government, Mattoon
- Grain Elevators, Mattoon
- Graphic Design Services, Mattoon - Graphic Designer
- Graphic Designer & Artist Services, Mattoon
- Greeting Card Stores, Mattoon
- Grocery Stores & Supermarkets, Mattoon
- Ground Transportation, Except Passenger, Mattoon
- Gun Repair & Services, Mattoon
- Guns & Gunsmith Services, Mattoon
- Gymnastics Schools, Mattoon
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