- Cabinets & Cabinet Hardware, Philadelphia
- Cabinets Refacing, Refinishing & Building, Philadelphia - Kitchen, Bathroom, Medicine, Storage & Custom Cabinets Contractors
- Cabins Cottages & Chalet Rental, Philadelphia
- Cafe Restaurants, Philadelphia
- Campgrounds, Philadelphia
- Candy, Nut & Confectionery Wholesale & Retail, Philadelphia - Candy Stores
- Car Rental, Philadelphia - Rental Cars & Lease Service
- Career & Vocational Counseling, Philadelphia
- Carnivals, Fairs & Exhibitions, Philadelphia
- Carpenters, Philadelphia - Carpentry Contractors
- Carpet Rug & Upholstery Cleaners, Philadelphia
- Carpet, Rug & Linoleum Flooring Dealers, Philadelphia
- Cars, Truck, Van & SUV Car Dealerships, Philadelphia - Auto Dealers
- Casino Hotels & Resorts, Philadelphia
- Casinos, Philadelphia
- Casual Dining Restaurants, Philadelphia
- Catholic Churches, Philadelphia
- Cellular & Mobile Phone Service, Philadelphia
- Central American Restaurants, Philadelphia
- Chambers Of Commerce, Philadelphia
- Check Cashing Services, Philadelphia
- Chicken Restaurants, Philadelphia
- Child Care & Day Care Services, Philadelphia
- Child Related Social Services, Philadelphia
- Chinese Restaurants, Philadelphia
- Chiropractic Clinics, Philadelphia
- Chiropractor, Philadelphia
- Christian Churches, Philadelphia
- Church Of Christ, Philadelphia
- Church Of God, Philadelphia
- Church Of Jesus Christ Of Latter Day Saints, Philadelphia
- Churches 1 Of 3, Philadelphia
- Churches 2 Of 3, Philadelphia
- Cigar, Cigarette & Tobacco Store & Supplies, Philadelphia
- City & County Administrative Agencies, Philadelphia
- City & County Government, Philadelphia
- City & County Law Enforcement, Philadelphia
- Cleaning & Maintenance Services, Philadelphia
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- Clinics, Philadelphia
- Clothing Stores, Philadelphia - Clothes & Accessories
- CNC Machine Shop, Philadelphia
- Coffee, Espresso & Tea House Restaurants, Philadelphia
- Coin Operated Games, Philadelphia
- Coin Operated Machines & Equipment, Philadelphia
- Commercial & Industrial Laundry, Philadelphia
- Commercial & Industrial Photographers, Philadelphia
- Commercial Equipment, Philadelphia
- Commercial Printing, Philadelphia
- Commercial Printing Manufacturers, Philadelphia
- Commodity & Merchandise Storage & Warehouse, Philadelphia - Warehousing
- Communications Services, Philadelphia
- Community & Recreational Facilities, Philadelphia
- Community Services, Philadelphia
- Computer & Equipment Rental & Leasing, Philadelphia
- Computer & Software Stores, Philadelphia
- Concrete, Philadelphia - Cement & Concrete Products, Suppliers, Companies
- Concrete & Cement, Philadelphia
- Concrete Product Manufacturers, Philadelphia
- Construction, Philadelphia
- Construction & Civil Engineer, Philadelphia
- Construction Companies, Philadelphia
- Construction Machinery, Philadelphia - Mining Machinery
- Construction Services, Philadelphia
- Consultants & Services, Philadelphia
- Contractor Equipment & Supplies, Philadelphia - Construction Equipment & Machinery
- Contractors Equipment & Supplies - Rental & Leasing, Philadelphia
- Contractors Supplies & Equipment, Philadelphia
- Convenience Stores, Philadelphia
- Convention & Meeting Facilities, Philadelphia - Meeting Rooms
- Cosmetics, Toiletries, Perfumes & Beauty Supply Stores, Philadelphia
- Counseling Services, Philadelphia
- County Police, Philadelphia
- Credit & Debt Counseling Services, Philadelphia
- Credit Restoration Service, Philadelphia
- Credit Unions, Philadelphia
- Culverts & Other Drainage Pipes, Philadelphia
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