- Cafe Restaurants, Poquoson
- Carpenters, Poquoson - Carpentry Contractors
- Cars, Truck, Van & SUV Car Dealerships, Poquoson - Auto Dealers
- Casual Dining Restaurants, Poquoson
- Cellular & Mobile Phone Service, Poquoson
- Central American Restaurants, Poquoson
- Certified Residential Broker, Poquoson
- Child Care & Day Care Services, Poquoson
- Child Related Social Services, Poquoson
- Chinese Restaurants, Poquoson
- Chiropractic Clinics, Poquoson
- Chiropractor, Poquoson
- Church Of Jesus Christ Of Latter Day Saints, Poquoson
- Churches 1 Of 3, Poquoson
- Churches 2 Of 3, Poquoson
- City & County Government, Poquoson
- Clinics, Poquoson
- CNC Machine Shop, Poquoson
- Coffee, Espresso & Tea House Restaurants, Poquoson
- Coin Dealers & Supplies , Poquoson
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- Commercial Equipment, Poquoson
- Communications Contractors, Poquoson
- Communications Services, Poquoson
- Community Services, Poquoson
- Computer Documentation Service, Poquoson
- Computer Services, Poquoson
- Construction, Poquoson
- Construction Control Service, Poquoson
- Construction Inspectors, Poquoson
- Construction Management & Supervision, Poquoson
- Construction Services, Poquoson
- Consultants & Services, Poquoson
- Convalescent Homes Placement Services, Poquoson - Convalescent Care
- Convenience Stores, Poquoson
- Credit Card Merchant Services, Poquoson
- Credit Card Plan Services, Poquoson
- Cruise Agents, Poquoson - Travel Agents
- Cruise Lines, Poquoson - Cruises
- Custom Sewing & Alterations, Poquoson
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