- Cafe Restaurants, Port Royal
- Carnivals, Fairs & Exhibitions, Port Royal
- Carpet, Rug & Linoleum Flooring Dealers, Port Royal
- Casual Dining Restaurants, Port Royal
- CD-ROM Duplication, Port Royal
- CD-ROM Services, Port Royal
- Churches 1 Of 3, Port Royal
- City & County Administrative Agencies, Port Royal
- City & County Government, Port Royal
- Community & Recreational Facilities, Port Royal
- Community Services, Port Royal
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- Computer Services, Port Royal
- Concrete, Port Royal - Cement & Concrete Products, Suppliers, Companies
- Concrete & Cement, Port Royal
- Concrete Product Manufacturers, Port Royal
- Construction, Port Royal
- Construction Equipment Rental & Leasing, Port Royal
- Construction Services, Port Royal
- Consultants & Services, Port Royal
- Convenience Stores, Port Royal
- Craft Supplies, Port Royal - Hobby & Craft Stores
- Crop Planting & Protecting, Port Royal - Soil Preparation & Cultivating
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