- Caps Hats & Head Wear Manufacturers, Holtville
- Car Detailing & Wash Service, Holtville - Auto Detailing
- Car Wash, Cleaning, Wax & Polish Service, Holtville
- Casual Dining Restaurants, Holtville
- Catholic Churches, Holtville
- Cellular & Mobile Phone Service, Holtville
- Central American Restaurants, Holtville
- Chambers Of Commerce, Holtville
- Child Care & Day Care Services, Holtville
- Child Related Social Services, Holtville
- Chinese Restaurants, Holtville
- Churches 1 Of 3, Holtville
- Churches 2 Of 3, Holtville
- City & County Administrative Agencies, Holtville
- City & County Government, Holtville
- Clothing Stores, Holtville - Clothes & Accessories
- Colleges & Universities, Holtville
- Communications Services, Holtville
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- Community Church, Holtville
- Community Churches, Holtville
- Community Services, Holtville
- Computer & Software Stores, Holtville
- Computer Stores, Holtville
- Computers Dealers Used & Refurbished, Holtville
- Concrete Contractors, Holtville - Concrete Construction & Concrete Companies
- Construction, Holtville
- Construction Services, Holtville
- Consultants & Services, Holtville
- Convenience Stores, Holtville
- Cooling System & Parts, Holtville - Antifreeze, Radiator, Water Pump, Fan, Hoses, Belts, etc
- Country Cooking Restaurants, Holtville
- Court Reporter , Holtville - Stenographer & Convention Reporters
- Crop Planting & Protecting, Holtville - Soil Preparation & Cultivating
- Crop Precooling, Holtville
- Crop Preparation For Market, Holtville
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