- Cabinets & Cabinet Hardware, Farmingville
- Cabinets Refacing, Refinishing & Building, Farmingville - Kitchen, Bathroom, Medicine, Storage & Custom Cabinets Contractors
- Cafe Restaurants, Farmingville
- Car Detailing & Wash Service, Farmingville - Auto Detailing
- Car Wash, Cleaning, Wax & Polish Service, Farmingville
- Carpenters, Farmingville - Carpentry Contractors
- Casual Dining Restaurants, Farmingville
- Catalog, Mail-Order & Electronic Shopping, Farmingville
- Caterers Food Services, Farmingville
- Catholic Churches, Farmingville
- Cellular & Mobile Phone Equipment & Systems Installation, Repair & Service, Farmingville
- Cellular & Mobile Phone Service, Farmingville
- Central American Restaurants, Farmingville
- Charismatic Church, Farmingville
- Chicken Restaurants, Farmingville
- Child Care & Day Care Services, Farmingville
- Children's Clothing Stores, Farmingville - Infant, Babies & Kids Clothing
- Chinese Restaurants, Farmingville
- Chiropractor, Farmingville
- Christian Churches, Farmingville
- Churches 1 Of 3, Farmingville
- City & County Administrative Agencies, Farmingville
- City & County Government, Farmingville
- Cleaning & Maintenance Services, Farmingville
- Cleaning & Restoration Contractors, Including Sandblasting, Farmingville
- Cleaning Supplies & Products, Farmingville
- Clinics, Farmingville
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- Clothing Stores, Farmingville - Clothes & Accessories
- Coffee, Farmingville
- Coffee, Espresso & Tea House Restaurants, Farmingville
- Coin Dealers & Supplies , Farmingville
- Colleges & Universities, Farmingville
- Commercial & Industrial Laundry, Farmingville
- Commercial Equipment, Farmingville
- Commercial Physical Research, Farmingville
- Commercial Printing Manufacturers, Farmingville
- Communications Services, Farmingville
- Community & Recreational Facilities, Farmingville
- Community Services, Farmingville
- Computer & Laptop Repair, Farmingville - PC Repair Services
- Computer Repair, Farmingville
- Concrete Contractors, Farmingville - Concrete Construction & Concrete Companies
- Concrete Handling Services, Farmingville - Concrete Pumping
- Condiments & Sauces, Farmingville
- Congregational Church, Farmingville
- Construction, Farmingville
- Construction Services, Farmingville
- Consultants & Services, Farmingville
- Convenience Stores, Farmingville
- Cooking, Food & Beverage Equipment, Farmingville
- Copying & Duplicating Services, Farmingville
- Cosmetics, Toiletries, Perfumes & Beauty Supply Stores, Farmingville
- Credit Unions, Farmingville
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