| Abbreviation | Definition |
|---|---|
| ODCR | On Demand Court Records |
| ODCS | Office of Deputy Chief of Staff |
| ODPO | Off Duty Police Officer |
| ODWI | Operation Driving While Intoxicated |
| OFC | Officer |
| OFC | Operational Firearms Commander |
| OFFLOC | Offence Location |
| OFG | Operational Firearms Group |
| OFPS | Ontario Forensic Pathology Service |
| OFT | Office of Fair Trading |
| OHP | Oklahoma Highway Patrol |
| OIC | Officer In the Case |
| OIC | Oh, I See |
| OIF | Officer Involved Fatalities |
| OIPC | Organisation internationale de police criminelle |
| OIPM | Of the Independent Police Monitor |
| OIPM | Orleans Independent Police Monitor |
| OIPRD | Office of the Independent Police Review Director (Ontario, Canada) |
| OIS | Officer-Involved Shooting |
| OJEC | Official Journal of the European Communities |