| Abbreviation | Definition |
|---|---|
| IO | Instant Offense |
| IO | Investigating Officer |
| IOC | Incident Operations Center |
| IOCT | Indoor Obstacle Course Test |
| IOMS | Integrated Offender Management System |
| IOT | Indoor Obstacle Test |
| IP | Injured Party |
| IPA | Independent Police Auditor |
| IPC | Intelligent Peoples' Crime |
| IPCA | Independent Police Conduct Authority |
| IPCC | Independent Police Complaints Commission |
| IPCC | Independent Police Complaints Committee |
| IPD | Irvine Police Department |
| IPES | International Police Executive Symposium |
| IPI | Inwald Personality Inventory |
| IPID | Independent Police Investigating Directorate |
| IPID | Independent Police Investigation Directorate |
| IPID | Independent Police Investigative Directorate |
| IPLDP | Initial Police Learning and Development Programme |
| IPMC | International Police Motor Corporation |