- Campgrounds, Shellsburg
- Candy, Nut & Confectionery Wholesale & Retail, Shellsburg - Candy Stores
- Car Rental, Shellsburg - Rental Cars & Lease Service
- Carpenters, Shellsburg - Carpentry Contractors
- Casual Dining Restaurants, Shellsburg
- Caterers Food Services, Shellsburg
- Churches 1 Of 3, Shellsburg
- City & County Government, Shellsburg
- City & County Law Enforcement, Shellsburg
- Clinics, Shellsburg
- Communications Services, Shellsburg
- Community & Recreational Facilities, Shellsburg
- Community Church, Shellsburg
- Community Churches, Shellsburg
- Community Services, Shellsburg
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- Computer & Software Stores, Shellsburg
- Computer Services, Shellsburg
- Computer Stores, Shellsburg
- Computer Supplies, Parts, Equipments & Accessories, Shellsburg
- Computers Hardware & Supplies Networking Hardware, Shellsburg
- Concrete, Shellsburg - Cement & Concrete Products, Suppliers, Companies
- Concrete & Cement, Shellsburg
- Concrete Contractors, Shellsburg - Concrete Construction & Concrete Companies
- Concrete Product Manufacturers, Shellsburg
- Construction, Shellsburg
- Consultants & Services, Shellsburg
- Convenience Stores, Shellsburg
- County Police, Shellsburg
- Credit Card Merchant Services, Shellsburg
- Credit Card Plan Services, Shellsburg
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