- Cabins Cottages & Chalet Rental, Portola
- Cable TV Companies & Services, Portola
- Cafe Restaurants, Portola
- Campgrounds, Portola
- Carpet Rug & Upholstery Cleaners, Portola
- Casual Dining Restaurants, Portola
- Caterers Food Services, Portola
- Catholic Churches, Portola
- Central American Restaurants, Portola
- Child Care & Day Care Services, Portola
- Chinese Restaurants, Portola
- Chiropractic Clinics, Portola
- Chiropractor, Portola
- Church Of Jesus Christ Of Latter Day Saints, Portola
- Churches 1 Of 3, Portola
- Churches 2 Of 3, Portola
- City & County Administrative Agencies, Portola
- City & County Government, Portola
- Cleaning & Maintenance Services, Portola
- Cleaning & Restoration Contractors, Including Sandblasting, Portola
- Clinics, Portola
- Clothing Stores, Portola - Clothes & Accessories
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- Cocktail Lounges, Portola
- Coffee, Portola
- Coffee & Tea Stores, Portola
- Coffee, Espresso & Tea House Restaurants, Portola
- Collectibles, Portola
- Commercial Printing, Portola
- Communications Services, Portola
- Community Services, Portola
- Computer & Laptop Repair, Portola - PC Repair Services
- Computer & Software Stores, Portola
- Computer Repair, Portola
- Concrete Contractors, Portola - Concrete Construction & Concrete Companies
- Concrete Handling Services, Portola - Concrete Pumping
- Construction, Portola
- Construction Companies, Portola
- Construction Equipment Rental & Leasing, Portola
- Consultants & Services, Portola
- Convenience Stores, Portola
- Cosmetics, Toiletries, Perfumes & Beauty Supply Stores, Portola
- Cremation Services, Supplies & Equipment, Portola
- Critical & Emergency Care Doctors, Portola - Intensive Care Doctors, Physicians & Surgeons
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