| Abbreviation | Definition |
|---|---|
| JBIUA | Journeymen Barbers International Union of America |
| JBU | Jydsk Boldspil Union |
| JCLU | Japan Civil Liberties Union |
| JCSA | Jamaica Civil Service Association |
| JCTU | Jamaica Confederation of Trade Unions |
| JCTU | Joint Committee of Trade Unions |
| JCTU | Joint Confederation of Trade Unions |
| JCTU | Joint Council of Trade Unions |
| JCU | Jordan Credit Union |
| JDSU | Jharkhand Disom Students Union |
| JESUS | Joint European Slave Union Ship |
| JFCU | Jamaica Fishermen Co-operative Union |
| JPU | Jewish Philanthropic Union |
| JRFU | Japan Rugby Football Union |
| JSU | Jewish Student Union |
| JTU | Japan Triathlon Union |
| JTU | Jyllands Tennis Union |
| JU | Junge Union |
| JU | Jungen Union |
| JUA | Judo Union Of Asia |