| Abbreviation | Definition |
|---|---|
| CIREA | Centre for Information, Reflection, and Exchange on Asylum |
| CIRG | Community-Industry Response Group |
| CIS | Criminal Information System |
| CISO | Criminal Intelligence Service Ontario |
| CISP | Community Intensive Supervision Program |
| CIT | Crisis Intervention Team |
| CIU | Collision Investigation Unit |
| CJ | Car Jacking |
| CJ | Cracking Job |
| CJA | Criminal Justice Act |
| CJD | Criminal Justice Department |
| CJPO | Criminal Justice and Public Order Act 1994 |
| CJPW | Central Java Police Watch |
| CJSU | Criminal Justice Support Unit |
| CJUII | Criminal Justice Unit Information System model 2 |
| CK | Cold Killer |
| CK | Crip Killer |
| CK | Crip Kingdom |
| CLEA | California Law Enforcement Association |
| CLERK | Computerized Law Enforcement Record Keeping |