- Cabins Cottages & Chalet Rental, Greenwich
- Cable TV Companies & Services, Greenwich
- Car Detailing & Wash Service, Greenwich - Auto Detailing
- Car Wash, Cleaning, Wax & Polish Service, Greenwich
- Casual Dining Restaurants, Greenwich
- Charitable & Non-Profit Organizations, Greenwich
- Chimney & Fireplace Construction Contractors, Greenwich - Installation, Cleaning & Repair Services
- Chimney Cleaning & Repair, Greenwich - Fireplace - Chimney Sweep Services
- Christian Churches, Greenwich
- Church Of Christ, Greenwich
- Churches 1 Of 3, Greenwich
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- Churches 3 Of 3, Greenwich
- City & County Government, Greenwich
- CNC Machine Shop, Greenwich
- Communications Services, Greenwich
- Community Services, Greenwich
- Construction, Greenwich
- Consultants & Services, Greenwich
- Contractor Equipment & Supplies, Greenwich - Construction Equipment & Machinery
- Contractors Equipment & Supplies - Rental & Leasing, Greenwich
- Convenience Stores, Greenwich
- Craft Supplies, Greenwich - Hobby & Craft Stores
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