- Cabins Cottages & Chalet Rental, Jefferson
- Cable TV Companies & Services, Jefferson
- Cafe Restaurants, Jefferson
- Cakes, Pies, & Pastries, Jefferson
- Campgrounds, Jefferson
- Candy, Nut & Confectionery Wholesale & Retail, Jefferson - Candy Stores
- Cars, Truck, Van & SUV Car Dealerships, Jefferson - Auto Dealers
- Casual Dining Restaurants, Jefferson
- Caterers Food Services, Jefferson
- Catholic Churches, Jefferson
- Central American Restaurants, Jefferson
- Chambers Of Commerce, Jefferson
- Child & Abuse Information Services, Jefferson
- Child Care & Day Care Services, Jefferson
- Christian Churches, Jefferson
- Church Of Christ, Jefferson
- Church Of The Living God, Jefferson
- Churches 1 Of 3, Jefferson
- Churches 2 Of 3, Jefferson
- Churches Seventh Day Adventist, Jefferson
- City & County Administrative Agencies, Jefferson
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- City & County Government, Jefferson
- Cleaning & Maintenance Services, Jefferson
- Clinics, Jefferson
- Clothing Stores, Jefferson - Clothes & Accessories
- CNC Machine Shop, Jefferson
- Collectibles, Jefferson
- Collection Agency Services, Jefferson
- Commercial Equipment, Jefferson
- Commercial Printing, Jefferson
- Communications Services, Jefferson
- Community & Recreational Facilities, Jefferson
- Community Centers, Jefferson
- Community Services, Jefferson
- Construction, Jefferson
- Construction Equipment Rental & Leasing, Jefferson
- Construction Machinery, Jefferson - Mining Machinery
- Consultants & Services, Jefferson
- Convenience Stores, Jefferson
- Credit Unions, Jefferson
- Crude Petroleum & Natural Gas, Jefferson
- Custom Sewing & Alterations, Jefferson
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