| Abbreviation | Definition |
|---|---|
| CNTM | Canada's Next Top Model |
| CNYL | Canadian Nexen Yemen Ltd |
| COAA | Canadian Operatic Arts Academy |
| COAB | Canadian Organic Advisory Board |
| COBD | Canadian Online Business Development |
| COC | The Canadian Opera Company |
| COCA | Canadian Organization of Campus Activities |
| CODF | Canadian Open Dialogue Forum |
| CODI | Canadian Organization Development Institute |
| COEF | Canada Ontario Export Forum |
| COGUA | Canadian Off Grid Utilities Association |
| COHA | Canadian Oral History Association |
| COHA | Canadian Ornamental Horticulture Alliance |
| COIA | Canada Ontario Immigration Agreement |
| COIP | Canadian Organization for International Philanthropy |
| COM | Commander of the Order of Merit of the police forces |
| COMB | Canadian Outdoor Measurement Bureau |
| COMC | Canadian Open Mathematics Challenge |
| COMS | Canadian Oriental Medical Symposium |
| COMTA | Canadian Orthopractic Manual Therapy Association |