HIIA
| Acronym | Definition |
|---|---|
| HIIA | Hungarian Institute of International Affairs (est. 2007) |
| HIIA | Home Inspection Institute of America |
| HIIA | Hawaii Independent Insurance Agents Association (professional organization) |
| HIIA | Health Inequality Impact Assessment |
| HIIA | Hog Island Improvement Association (Portsmouth, RI) |
| HIIA | Holiday Isle Improvement Association |