| Acronym | Definition |
|---|
| CCCO➣Central Committee for Conscientious Objectors |
| CCCO➣Canadian Capital Cities Organization (Ottawa, Ontario, Canada) |
| CCCO➣Colorado Community Colleges Online |
| CCCO➣Christian Coalition of Colorado (Denver, CO) |
| CCCO➣Communauté de Communes du Canton d'Orthez (French: Community of Municipalities of the Canton of Orthez; Orthez, France) |
| CCCO➣Contra Costa Chamber Orchestra (Walnut Creek, CA) |
| CCCO➣Joint Committee on Climatic Changes and the Ocean |