CCIU
| Acronym | Definition |
|---|---|
| CCIU | Chester County Intermediate Unit (Pennsylvania) |
| CCIU | Comité Central Israelita del Uruguay (Spanish: Jewish Central Committee of Uruguay) |
| CCIU | CEF (Contigency Expeditionary Force) Control Interface Unit (US DoD) |
| CCIU | Computer Crimes Investigation Unit |
| CCIU | Central Criminal Investigation Unit (Kosovo) |
| CCIU | Commercial Central Interface Unit. |