- Campgrounds, Darlington
- Carbon Activated, Darlington
- Casual Dining Restaurants, Darlington
- Caterers Food Services, Darlington
- Catholic Churches, Darlington
- Chemical Products, Darlington - Chemical Distributors, Dealers, Wholesale, etc
- Chimney Cleaning & Repair, Darlington - Fireplace - Chimney Sweep Services
- Chiropractor, Darlington
- Christian Churches, Darlington
- Churches 1 Of 3, Darlington
- City & County Government, Darlington
- City & County Law Enforcement, Darlington
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- CNC Machine Shop, Darlington
- Coin Operated Machines & Equipment, Darlington
- Commercial Equipment, Darlington
- Community & Recreational Facilities, Darlington
- Community Services, Darlington
- Concrete Contractors, Darlington - Concrete Construction & Concrete Companies
- Construction, Darlington
- Consultants & Services, Darlington
- Convenience Stores, Darlington
- Corrosion Control, Darlington
- Corrosion Control, Darlington
- County Police, Darlington
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