- Cable TV Companies & Services, Jefferson Valley
- Car Rental, Jefferson Valley - Rental Cars & Lease Service
- Carpenters, Jefferson Valley - Carpentry Contractors
- Casual Dining Restaurants, Jefferson Valley
- Caterers Food Services, Jefferson Valley
- Child Parent Development Centers, Jefferson Valley
- Child Related Social Services, Jefferson Valley
- Children's Clothing Stores, Jefferson Valley - Infant, Babies & Kids Clothing
- Chinese Restaurants, Jefferson Valley
- Chiropractor, Jefferson Valley
- Cleaning & Maintenance Services, Jefferson Valley
- Cleaning & Restoration Contractors, Including Sandblasting, Jefferson Valley
- Coffee, Jefferson Valley
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- Coffee, Espresso & Tea House Restaurants, Jefferson Valley
- Coin Dealers & Supplies , Jefferson Valley
- Commercial Printing, Jefferson Valley
- Communications Services, Jefferson Valley
- Community & Recreational Facilities, Jefferson Valley
- Community Services, Jefferson Valley
- Construction, Jefferson Valley
- Construction Services, Jefferson Valley
- Consultants & Services, Jefferson Valley
- Contractor Equipment & Supplies, Jefferson Valley - Construction Equipment & Machinery
- Convenience Stores, Jefferson Valley
- Custom Sewing & Alterations, Jefferson Valley
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