| Abbreviation | Definition |
|---|---|
| CCHCC | le Comité Canadien de l’Harmonisation des Codes de Construction |
| CCRA | Center City Residents' Association |
| CDA | Census Designated Area |
| CFMO | Central Furnishing Management Office |
| CGRC | Cultural and Global Residential College |
| CHEER | Community HDB Engaging Elderly Residents |
| CIRCA | Contents Insurance Residential Cost Address |
| CIRS | Chinmaya International Residential School |
| CMRC | Central Mississippi Residential Center |
| CMRS | Certified Military Residential Specialists |
| CNRF | Consortium of Neurology Residents and Fellows |
| COR | Coalition of Oakland Residents |
| CPRA | Controlled Parking Residential Area |
| CR | Clinical Resident |
| CRAAP | Concerned Residents Against Airport Pollution |
| CRAC | Chisholm Residents Activity Club |
| CRAI | Combined Residents Against Incineration |
| CRAMM | Concerned Residents Against Misrepresentation and Mismanagement |
| CRAN | Custom Residential Architects Network |
| CRCC | Charlestown Residential Collection Center |