HJO
| Acronym | Definition |
|---|---|
| HJO | Haley Joel Osment (actor) |
| HJO | Hungry Jack Canoe Outfitters (Grand Marais, Minnesota) |
| HJO | Hogere Juridische Opleiding (Dutch: Higher Legal Education; Netherlands) |
| HJO | Hospitality Jobs Online (resource) |
| HJO | Heartland Jazz Orchestra (est. 1999) |