| Abbreviation | Definition |
|---|---|
| CIA | Carnegie Involvement Association |
| CIA | Christmas In Action |
| CIA | Christmas In April |
| CIA | Coalition for Immediate Action |
| CIA | Compassion In Action |
| CIAA | Council of Ijaw Associations Abroad |
| CIAI | Centre of Integration for African Immigrants |
| CIAI | Cochlear Implant Association International |
| CIAI | Cochlear Implant Association, Inc. |
| CIAI | Communities In Action, Inc. |
| CIB | Centre for International Briefing |
| CIBER | Center for International Business Education Research |
| CIBI | Council of Independent Black Institutions |
| CIC | Cambodian Information Center |
| CIC | Charitable Incorporated Organisation |
| CIC | Chronic Illness Coalition |
| CICAP | Comitato Italiano per il Controllo delle Affermazioni sulle Pseudoscienze |
| CICB | Cecchetti International Classical Ballet |
| CICC | Center for the Improvement of Child Caring |
| CICC | Coalition for the International Criminal Court |