- Cafe Restaurants, Northfield
- Casual Dining Restaurants, Northfield
- Chemical & Agricultural Industrial Equipment, Northfield
- Churches 1 Of 3, Northfield
- City & County Government, Northfield
- CNC Machine Shop, Northfield
- Coffee, Espresso & Tea House Restaurants, Northfield
- Community Services, Northfield
- Computer & Audio Visual Services, Northfield
- Computer System Consultants, Northfield - IT Consulting Services
- Computer System Designers & Consultants, Northfield
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- Concrete, Northfield - Cement & Concrete Products, Suppliers, Companies
- Concrete & Cement, Northfield
- Concrete Product Manufacturers, Northfield
- Congregational Church, Northfield
- Construction, Northfield
- Construction Companies, Northfield
- Construction Equipment Rental & Leasing, Northfield
- Consultants & Services, Northfield
- Convenience Stores, Northfield
- Cosmetics, Toiletries, Perfumes & Beauty Supply Stores, Northfield
- Crushed Stone & Rock, Northfield - Crushed Granite, Concrete, Gravel, etc
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