- Cabinets & Cabinet Hardware, Ellington
- Cafe Restaurants, Ellington
- Car Rental, Ellington - Rental Cars & Lease Service
- Carpenters, Ellington - Carpentry Contractors
- Cars, Truck, Van & SUV Car Dealerships, Ellington - Auto Dealers
- Casual Dining Restaurants, Ellington
- Caterers Food Services, Ellington
- Cellular & Mobile Phone Equipment & Systems Installation, Repair & Service, Ellington
- Cellular & Mobile Phone Service, Ellington
- Chemicals & Related Products, Ellington
- Child Care & Day Care Services, Ellington
- Child Related Social Services, Ellington
- Chinese Restaurants, Ellington
- Chiropractor, Ellington
- Christian Churches, Ellington
- Chuck Wagon Restaurant, Ellington
- Church Of Christ, Ellington
- Church Of Jesus Christ Of Latter Day Saints, Ellington
- Churches 1 Of 3, Ellington
- Churches 3 Of 3, Ellington
- City & County Government, Ellington
- Cleaning & Maintenance Services, Ellington
- Clinics, Ellington
- Clock & Watch Stores, Ellington
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- CNC Machine Shop, Ellington
- Commercial Equipment, Ellington
- Commercial Printing Manufacturers, Ellington
- Communications Services, Ellington
- Community Church, Ellington
- Community Churches, Ellington
- Community Services, Ellington
- Computer & Software Stores, Ellington
- Computer Repair, Ellington
- Computer Software & Services, Ellington
- Computer Software Service, Ellington
- Condiments & Sauces, Ellington
- Congregational Church, Ellington
- Construction, Ellington
- Consultants & Services, Ellington
- Contractors Supplies & Equipment, Ellington
- Convenience Stores, Ellington
- Cooking, Food & Beverage Equipment, Ellington
- Country Clubs, Ellington
- Country Cooking Restaurants, Ellington
- Cruise Agents, Ellington - Travel Agents
- Cruise Lines, Ellington - Cruises
- Cryogenic Equipment & Supplies, Ellington
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