- Cabins Cottages & Chalet Rental, Jefferson
- Cable TV Companies & Services, Jefferson
- Campgrounds, Jefferson
- Canoe & Kayak Rental, Jefferson
- Career & Vocational Counseling, Jefferson
- Carpet Rug & Upholstery Cleaners, Jefferson
- Cars, Truck, Van & SUV Car Dealerships, Jefferson - Auto Dealers
- Casual Dining Restaurants, Jefferson
- Catholic Churches, Jefferson
- Central American Restaurants, Jefferson
- Charitable & Non-Profit Organizations, Jefferson
- Child Care & Day Care Services, Jefferson
- Chinese Restaurants, Jefferson
- Chiropractor, Jefferson
- Christmas Trees & Wreaths Retail, Jefferson
- Churches 1 Of 3, Jefferson
- Churches 2 Of 3, Jefferson
- Cigar, Cigarette & Tobacco Store & Supplies, Jefferson
- City & County Administrative Agencies, Jefferson
- City & County Government, Jefferson
- City & County Law Enforcement, Jefferson
- Cleaning & Maintenance Services, Jefferson
- Clinics, Jefferson
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- Clocks Retail, Jefferson
- Collection Agency Services, Jefferson
- Commercial Equipment, Jefferson
- Commercial Printing Manufacturers, Jefferson
- Communications Services, Jefferson
- Community & Recreational Facilities, Jefferson
- Community Services, Jefferson
- Computer & Audio Visual Services, Jefferson
- Computer & Software Stores, Jefferson
- Computer Repair, Jefferson
- Computer Software & Services, Jefferson
- Computer Software Service, Jefferson
- Construction, Jefferson
- Construction Equipment Rental & Leasing, Jefferson
- Construction Services, Jefferson
- Consultants & Services, Jefferson
- Convenience Stores, Jefferson
- Counseling Professionals, Jefferson
- Counseling Services, Jefferson
- County Police, Jefferson
- Credit & Debt Counseling Services, Jefferson
- Custom Parts & Accessories, Jefferson
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