- Games & Hobbies, Clarksville
- Garage Building & Repair, Clarksville - Carports - Garage Builders
- Garage, Door & Window Products, Clarksville
- Garbage & Rubbish Removal, Clarksville
- Garment & Linen Services, Clarksville
- Gas & Air Compressors, Clarksville
- Gas Equipment Industrial, Clarksville
- Gas Station, Clarksville - Service & Filling Station
- General Business Consulting, Clarksville
- General Business Services, Clarksville
- General Consultants, Clarksville
- General Merchandise Stores, Clarksville
- General Travel Agents & Agencies, Clarksville
- Generator Sales & Rental, Clarksville - Contractors Supplies & Equipment
- Generators, Compressors, Pumps, Motors & Fans, Clarksville
- Geriatricians, Clarksville - Geriatric Specialists, Doctors, Physicians & Surgeons
- Gift Baskets, Clarksville
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- Gift Shops, Clarksville - Gift, Novelty & Souvenir Stores
- Gifts By Type & Occasion, Clarksville
- Gifts, Cards & Stationery Stores, Clarksville
- Glass & Glass Products, Clarksville
- Glass - Auto, Float, Plate, Window & Doors, Clarksville
- Gold, Silver & Platinum Buyers, Sellers & Dealers, Clarksville
- Golf Courses, Clarksville
- Gourmet Restaurants, Clarksville
- Government, Clarksville
- Grain Inspection, Clarksville
- Greeting Card Stores, Clarksville
- Grills & Grilling Equipment & Supplies, Clarksville
- Grocery Stores & Supermarkets, Clarksville
- Ground Transportation, Except Passenger, Clarksville
- Gun Repair & Services, Clarksville
- Guns & Gunsmith Services, Clarksville
- Gymnastics Schools, Clarksville
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