CCCO
| 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 |