| Abbreviation | Definition |
|---|---|
| JCSO | Jefferson County Sheriff's Office |
| JCSO | Johnston County Sheriff's Office |
| JCSP | Johnson County Sheriff's Posse |
| JD | Justifiably Dangerous |
| JDAC | JJIS District Area Contact |
| JDAI | Juvenile Detention Alternatives Initiative |
| JDH | Juvenile Detention Hall |
| JESCC | Joint Emergency Services Control Centre |
| JESIP | Joint Emergency Services Interoperability Programme |
| JFSM | J Forensic Sci Med |
| JIAC | Juvenile Intake and Assessment Center |
| JIC | Joint Intelligence Co-ordinator |
| JIF | Joint Initiative Funding |
| JIPTC | Jordan International Police Training Center |
| JJA | Juvenile Justice Authority |
| JKP | Jammu and Kashmir Police |
| JL | Just Loose |
| JL | Justice Legion |
| JMPD | Joburg metro police department |
| JMPD | Johannesburg Metro Police Department |