| Acronym | Definition |
|---|
| JO | Jordan |
| JO | Job Order |
| JO | Journalist (US Navy) |
| JO | Junior Olympics |
| JO | Jeux Olympiques (French: Olympic Games) |
| JO | Junior Officer |
| JO | Jermaine O'Neal (NBA player) |
| JO | Jedi Outcast (Jedi Knight Lucas Arts game) |
| JO | Journal Officiel de la République Française |
| JO | Joint Operation |
| JO | Judicial Officer |
| JO | Joint Ops (video game) |
| JO | Jamaica Observer |
| JO | Juvenile Offender |
| JO | Journal of Oceanography |
| JO | Juvenile Orion (anime) |
| JO | Just Oral |
| JO | Justice Ombudsman (various locations) |
| JO | Jointly Optimum |
| JO | Jurisdictional Officer (International Order of DeMolay) |
| JO | (USN Rating) Journalist |