- Cabinet Manufacturers, Loudonville
- Cabinets & Cabinet Hardware, Loudonville
- Cabins Cottages & Chalet Rental, Loudonville
- Cable TV Companies & Services, Loudonville
- Campgrounds, Loudonville
- Canoe & Kayak Rental, Loudonville
- Canoes & Kayaks, Loudonville - Equipment, Gear, PFD, Paddles & Accessories
- Carnivals, Fairs & Exhibitions, Loudonville
- Carpet & Rug Cleaners Water Extraction & Restoration, Loudonville
- Carpet Rug & Upholstery Cleaners, Loudonville
- Cars, Truck, Van & SUV Car Dealerships, Loudonville - Auto Dealers
- Casual Dining Restaurants, Loudonville
- Catholic Churches, Loudonville
- Cellular & Mobile Phone Service, Loudonville
- Chambers Of Commerce, Loudonville
- Charitable & Non-Profit Organizations, Loudonville
- Child Related Social Services, Loudonville
- Chinese Restaurants, Loudonville
- Chiropractor, Loudonville
- Christian Churches, Loudonville
- Church Of Christ, Loudonville
- Church Of God, Loudonville
- Church Of The Nazarene, Loudonville
- Churches 1 Of 3, Loudonville
- Churches 2 Of 3, Loudonville
- Cigar, Cigarette & Tobacco Store & Supplies, Loudonville
- City & County Administrative Agencies, Loudonville
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- City & County Government, Loudonville
- Cleaning & Maintenance Services, Loudonville
- Cleaning & Restoration Contractors, Including Sandblasting, Loudonville
- Clinics, Loudonville
- CNC Machine Shop, Loudonville
- Commercial Equipment, Loudonville
- Commercial Printing Manufacturers, Loudonville
- Communications Services, Loudonville
- Community & Recreational Facilities, Loudonville
- Community Church, Loudonville
- Community Churches, Loudonville
- Community Services, Loudonville
- Computer & Laptop Repair, Loudonville - PC Repair Services
- Computer Repair, Loudonville
- Concrete, Loudonville - Cement & Concrete Products, Suppliers, Companies
- Concrete & Cement, Loudonville
- Concrete & Pumice Bricks, Loudonville
- Concrete Contractors, Loudonville - Concrete Construction & Concrete Companies
- Concrete Product Manufacturers, Loudonville
- Construction, Loudonville
- Contact Lenses, Loudonville
- Convenience Stores, Loudonville
- Convention & Visitor Information & Bureaus, Loudonville - Tourist Information Centers
- Convention Services - Other, Loudonville
- Copper & Copper Products, Loudonville
- Credit Unions, Loudonville
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