HTRA
| Acronym | Definition |
|---|---|
| HTRA | Humboldt-Trinity Recreation Alliance (California) |
| HTRA | Human Trafficking Rescue Alliance |
| HTRA | High Time Resolution Astrophysics |
| HTRA | Homeowner Tax Relief Act |
| HTRA | Harding Township Recreation Association (New Vernon, NJ) |
| HTRA | HoofBeats Thoroughbred Racing Association |