- Cigarette Express
- Cigarette Mart
- Cigarette Store
- Cigarettes 4 Less
- Cigarette's Cheaper
- Cigarettes for Less
- Cimarron Apartments
- Cincinatti Bell
- Cincinnati Insurance
- Cinco de Mayo
- Cinderella
- Cindy Nails
- Cindy's
- Cinemark
- Cingular
- Cinnabon
- Cinnamonster
- Cintas
- Circa
- Circle A Food Mart
- Circle K
- Circle K Corporation - East Tampa District
- Circle K Corporation - Stores
- Circle K Corporation - West Tampa District
- Circle K Stores - Glendale Stores
- Circle K Stores - Scottsdale Stores
- Circle K Stores - Tempe Stores
- Circle S
- Circuit City
- Circuit Clerk
- Ciro's Pizza
- CIT Group
- Citgo
- Citgo Petroleum Corporation
- Citgo Quik Mart
- CITI Habitats
- Citi Trends
- Citibank
- CitiCapital Trailer Rental