| Abbreviation | Definition |
|---|---|
| CCIC | Complex challenges innovative cities |
| CCIG | Connected Cities and Inclusive Growth |
| CCRI | Circular Cities and Regions Initiative |
| CCSC | Co-Creating the Smart City |
| CCTD | Cité de la Culture et du Tourisme Durable |
| CCTR | Capital City |
| CCWL | Circle the Cities with Love |
| CDT | Centro De Traducciones |
| CEASE | Cities Empowered Against Sexual Exploitation |
| CEE | Cities for Education Entrepreneurship |
| CFF | Cities Finance Facility |
| CHATR | Cities Health and Active Transportation Research |
| CHATT | Shortened Name for Chattanooga, Tennessee |
| CHKC | China Hong Kong City |
| CHWK | Chilliwack |
| CIAT | Cities Impacts Adaptation Tool |
| CIAW | Cities Insurance Association of Washington |
| CIMEC | Cooperative ITS for Mobility in European Cities |
| CINTI | Cincinnati |
| CIVIC | Committee of Interested Volunteers Incorporating a City |