| Abbreviation | Definition |
|---|---|
| JSC | Judge of the Superior Court |
| JTHTL | Journal on Telecommunications and High Technology Law |
| JTIR | Justice Court Traffic Infraction Rules (court rules) |
| JUCR | Juvenile Court Rules (court rules) |
| JUI | Judging Under the Influence |
| JUMP | Juvenile Urban Mentoring Program |
| JUR | Jurisprudence |
| JUS | Justice |
| JUU | Judgment Under Uncertainty |
| JVQ | Juvenile Victimization Questionnaire |
| JWJ | Jobs with Justice |
| JYS | Juneau Youth Services, Inc. |
| JYS | Justify Your Silence |
| K | Kidnapping |
| K | Killers |
| K.C. | King's Counsel |
| KAAA | Kentucky Association of Administrative Adjudicators |
| KAH | Killas At Heart |
| KB | Kill Boys |
| KB | King's Bench |