- Cabins Cottages & Chalet Rental, Trumansburg
- Cable TV Companies & Services, Trumansburg
- Cafe Restaurants, Trumansburg
- Camper, Rvs & Travel Trailer Dealers, Trumansburg
- Campgrounds, Trumansburg
- Candy, Nut & Confectionery Wholesale & Retail, Trumansburg - Candy Stores
- Carnivals, Fairs & Exhibitions, Trumansburg
- Carpenters, Trumansburg - Carpentry Contractors
- Cars, Truck, Van & SUV Car Dealerships, Trumansburg - Auto Dealers
- Casual Dining Restaurants, Trumansburg
- Caterers Food Services, Trumansburg
- Catholic Churches, Trumansburg
- Cellular & Mobile Phone Equipment & Systems Installation, Repair & Service, Trumansburg
- Cellular & Mobile Phone Service, Trumansburg
- Child Care & Day Care Services, Trumansburg
- Child Related Social Services, Trumansburg
- Chiropractor, Trumansburg
- Church Of Jesus Christ Of Latter Day Saints, Trumansburg
- Churches 1 Of 3, Trumansburg
- City & County Administrative Agencies, Trumansburg
- City & County Government, Trumansburg
- City & County Law Enforcement, Trumansburg
- Cleaning & Maintenance Services, Trumansburg
- Clinics, Trumansburg
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- Clothing & Accessories Resale & Consignment Shops, Trumansburg
- Clothing Stores, Trumansburg - Clothes & Accessories
- Cocktail Lounges, Trumansburg
- Coffee & Tea Stores, Trumansburg
- Coffee, Espresso & Tea House Restaurants, Trumansburg
- Commercial & Literacy Writings, Trumansburg
- Commercial Printing Manufacturers, Trumansburg
- Communication Equipment & Systems, Trumansburg
- Communications Consultants, Trumansburg
- Communications Services, Trumansburg
- Community & Recreational Facilities, Trumansburg
- Community Services, Trumansburg
- Construction, Trumansburg
- Consultants & Services, Trumansburg
- Consultants Referral Service, Trumansburg
- Convenience Stores, Trumansburg
- Convention & Meeting Facilities, Trumansburg - Meeting Rooms
- Copying & Duplicating Services, Trumansburg
- Cosmetics, Trumansburg
- Country Cooking Restaurants, Trumansburg
- County Police, Trumansburg
- Cranes & Derricks, Trumansburg
- Cremation Services, Supplies & Equipment, Trumansburg
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