- Cabinets & Cabinet Hardware, Clarksville
- Cabins Cottages & Chalet Rental, Clarksville
- Cable TV Companies & Services, Clarksville
- Cafe Restaurants, Clarksville
- Campgrounds, Clarksville
- Car Detailing & Wash Service, Clarksville - Auto Detailing
- Car Wash, Cleaning, Wax & Polish Service, Clarksville
- Carpet & Rug Cleaners Water Extraction & Restoration, Clarksville
- Carpet Rug & Upholstery Cleaners, Clarksville
- Carpet, Rug & Linoleum Flooring Dealers, Clarksville
- Cars, Truck, Van & SUV Car Dealerships, Clarksville - Auto Dealers
- Casual Dining Restaurants, Clarksville
- Caterers Food Services, Clarksville
- Cellular & Mobile Phone Service, Clarksville
- Central American Restaurants, Clarksville
- Chambers Of Commerce, Clarksville
- Charitable & Non-Profit Organizations, Clarksville
- Check Cashing Services, Clarksville
- Chemicals & Related Products, Clarksville
- Child Care & Day Care Services, Clarksville
- Children's Clothing Stores, Clarksville - Infant, Babies & Kids Clothing
- Chinese Restaurants, Clarksville
- Chiropractor, Clarksville
- Christian Churches, Clarksville
- Christian Outreach Center, Clarksville
- Church Of Christ, Clarksville
- Church Of Jesus Christ Of Latter Day Saints, Clarksville
- Church Of The Nazarene, Clarksville
- Churches 1 Of 3, Clarksville
- Churches 2 Of 3, Clarksville
- Churches Seventh Day Adventist, Clarksville
- Cigar, Cigarette & Tobacco Store & Supplies, Clarksville
- Citizen Band Radio, Clarksville
- City & County Administrative Agencies, Clarksville
- City & County Courts, Clarksville
- City & County Government, Clarksville
- City & County Law Enforcement, Clarksville
- Cleaning & Maintenance Services, Clarksville
- Cleaning Chemical Compounds, Clarksville
- Cleaning Supplies & Products, Clarksville
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- Clinics, Clarksville
- Clothing Stores, Clarksville - Clothes & Accessories
- CNC Machine Shop, Clarksville
- Coin & Bill Count Sort & Wrapping Machines & Supplies, Clarksville
- Coin Operated Amusement Devices, Clarksville
- Colleges & Universities, Clarksville
- Commercial Equipment, Clarksville
- Commercial Printing Manufacturers, Clarksville
- Communications Consultants, Clarksville
- Communications Services, Clarksville
- Community & Recreational Facilities, Clarksville
- Community Centers, Clarksville
- Community Services, Clarksville
- Computer & Software Stores, Clarksville
- Computer Repair, Clarksville
- Computer Software & Services, Clarksville
- Computer Software Service, Clarksville
- Computer Stores, Clarksville
- Computer Stores - Other, Clarksville
- Concrete, Clarksville - Cement & Concrete Products, Suppliers, Companies
- Concrete & Cement, Clarksville
- Concrete Product Manufacturers, Clarksville
- Construction, Clarksville
- Construction Equipment Rental & Leasing, Clarksville
- Construction Services, Clarksville
- Consultants & Services, Clarksville
- Consumer Electronics, Clarksville
- Contact Lenses, Clarksville
- Contractor Tools Rental & Leasing, Clarksville
- Contractors Equipment & Supplies - Rental & Leasing, Clarksville
- Convenience Stores, Clarksville
- Cooling System & Parts, Clarksville - Antifreeze, Radiator, Water Pump, Fan, Hoses, Belts, etc
- Copying & Duplicating Services, Clarksville
- Cosmetics, Clarksville
- Cosmetics & Perfumes Outlets, Clarksville
- Counseling Services, Clarksville
- Country Clubs, Clarksville
- Country Cooking Restaurants, Clarksville
- Cremation Services, Supplies & Equipment, Clarksville
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