- Gambling & Lottery Services, Parkersburg
- Games & Hobbies, Parkersburg
- Garage Door Repair, Parkersburg
- Garage Doors & Door Operating Devices, Parkersburg
- Garage Doors & Gates, Parkersburg - Stores & Companies - Install & Repair Services
- Garage, Door & Window Products, Parkersburg
- Garbage & Rubbish Removal, Parkersburg
- Garment & Linen Services, Parkersburg
- Gas & Air Compressors, Parkersburg
- Gas Companies, Parkersburg
- Gas Equipment Industrial, Parkersburg
- Gas Station, Parkersburg - Service & Filling Station
- Gasket, Parkersburg - Supply & Wholesale - Gaskets, Packing & Sealing Device
- Gasoline, Parkersburg
- Gastroenterologists, Parkersburg - GI Doctors, Physicians & Surgeons (Gastroenterology)
- Gemologist, Parkersburg
- General Business Consulting, Parkersburg
- General Business Services, Parkersburg
- General Consultants, Parkersburg
- General Freight Trucking, Parkersburg - Motor Freight
- General Hardware Stores, Parkersburg
- General Management Consulting Services, Parkersburg - Management Consultants
- General Merchandise Stores, Parkersburg
- General Travel Agents & Agencies, Parkersburg
- Generators, Compressors, Pumps, Motors & Fans, Parkersburg
- Gift Baskets, Parkersburg
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- Gift Shops, Parkersburg - Gift, Novelty & Souvenir Stores
- Gifts By Type & Occasion, Parkersburg
- Gifts, Cards & Stationery Stores, Parkersburg
- Glass, Parkersburg
- Glass & Glass Products, Parkersburg
- Glass & Glazing Contractors, Parkersburg
- Glass - Auto, Float, Plate, Window & Doors, Parkersburg
- Glass Broken, Parkersburg
- Glass Tinting & Coating, Parkersburg - Home - Car Window Tinting
- Gold, Silver & Platinum Buyers, Sellers & Dealers, Parkersburg
- Golf Clubs Private, Parkersburg
- Golf Courses, Parkersburg
- Golf Equipment & Supplies Stores, Parkersburg - Golf Clubs, Balls, Carts, Bags, Apparel, Shoes & Accessories
- Gospel Church, Parkersburg
- Gourmet Restaurants, Parkersburg
- Government, Parkersburg
- Government Associations, Parkersburg
- Grace Gospel, Parkersburg
- Graphic Design Services, Parkersburg - Graphic Designer
- Graphic Designer & Artist Services, Parkersburg
- Grocery Stores & Supermarkets, Parkersburg
- Ground Transportation, Except Passenger, Parkersburg
- Guide & Directory Advertising Services, Parkersburg
- Gutters & Downspout Cleaning & Repairing, Parkersburg
- Gymnastics Schools, Parkersburg
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