| Abbreviation | Definition |
|---|---|
| OACP | Ontario Association Of Chiefs Of Police |
| OACP | Oregon Association Chiefs of Police |
| OAPE | Ontario Association of Police Educators |
| OBTJ | Offences Brought To Justice |
| OC | Oral Coersion |
| OCCR | Operational Coordination Command Center |
| OCD | Organized Crime Division |
| OCG | Organised Crime Group |
| OCID | Organized Crime Investigation Division |
| OCPC | Ontario Civilian Police Commission |
| OCPD | Ocean City Police Department |
| OCPD | Officer in Charge of Police District |
| OCPD | Oklahoma City Police Department |
| OCS | Officer Commanding Police Station |
| OCS | Operation Clean Sweep |
| OCSG | Organized Crime Strategy Group |
| OCT | Officer Cadet Trainee |
| OCU | Operational Command Unit |
| OD | Off Duty |
| OD | Operations Department |