| Abbreviation | Definition |
|---|---|
| CWTS | Christian Witness Theological Seminary |
| CWTS | Christian Workers Training School |
| CWV | Catholic War Veterans |
| CXG | Christian Xbox Gamers |
| CXZ | Cross Zealous |
| CY | Church Youth |
| CYA | Catholic Youth Apostolate |
| CYAN | Catholic Young Adults Network |
| CYC | Catholic Youth Council |
| CYC | Christian Youth Crusade |
| CYC | Committed Young Christians |
| CYCI | Christian and Yazidi Children in Iraq |
| CYCI | Christian and Yazidi Children of Iraq |
| CYCU | Chung Yuan Christian University |
| CYM | Catholic Youth Ministry |
| CYO | Catholic Youth Organization |
| CYO | Christian Youth Organization |
| CYSAG | Cyngor Ymgynghorol Sefydlog Addysg Grefyddol (Welsh: Standing Advisory Council for Religious Education; UK) |
| CYTD | Christian Youths for True Democracy |
| CZBA | Centro Zen Buddhista argentino (Spanish: Zen Buddhist Center Argentino) |