- Cancer Educational, Referral & Support Service Centers, Rayville
- Cancer Treatment & Information Services , Rayville
- Car Detailing & Wash Service, Rayville - Auto Detailing
- Car Wash, Cleaning, Wax & Polish Service, Rayville
- Cars, Truck, Van & SUV Car Dealerships, Rayville - Auto Dealers
- Casual Dining Restaurants, Rayville
- Caterers Food Services, Rayville
- Catholic Churches, Rayville
- Central American Restaurants, Rayville
- Charitable & Non-Profit Organizations, Rayville
- Chemical Products, Rayville - Chemical Distributors, Dealers, Wholesale, etc
- Chicken Restaurants, Rayville
- Child Care & Day Care Services, Rayville
- Child Related Social Services, Rayville
- Chinese Restaurants, Rayville
- Chiropractor, Rayville
- Christian Churches, Rayville
- Church Of Christ, Rayville
- Church Of God, Rayville
- Churches 1 Of 3, Rayville
- Churches 2 Of 3, Rayville
- Cigar, Cigarette & Tobacco Store & Supplies, Rayville
- City & County Administrative Agencies, Rayville
- City & County Government, Rayville
- City & County Law Enforcement, Rayville
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- Clinics, Rayville
- Clothing Stores, Rayville - Clothes & Accessories
- CNC Machine Shop, Rayville
- Commercial & Industrial Laundry, Rayville
- Commercial Equipment, Rayville
- Commercial Printing, Rayville
- Commodity & Merchandise Storage & Warehouse, Rayville - Warehousing
- Communications Services, Rayville
- Community & Recreational Facilities, Rayville
- Community Services, Rayville
- Concrete, Rayville - Cement & Concrete Products, Suppliers, Companies
- Concrete & Cement, Rayville
- Concrete Product Manufacturers, Rayville
- Construction, Rayville
- Construction Services, Rayville
- Consultants & Services, Rayville
- Contractor Equipment & Supplies, Rayville - Construction Equipment & Machinery
- Convenience Stores, Rayville
- Cotton Ginning, Rayville
- Cotton Ginning Equipment & Supplies, Rayville
- County Police, Rayville
- Cremation Services, Supplies & Equipment, Rayville
- Crop Planting & Protecting, Rayville - Soil Preparation & Cultivating
- Crop Processing, Rayville
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