| Acronym | Definition |
|---|
| IRHA➣International Rainwater Harvesting Alliance |
| IRHA➣Irish Road Haulage Association (Ireland) |
| IRHA➣Indiana Rural Health Association |
| IRHA➣Interlake Regional Health Authority (Manitoba, Canada) |
| IRHA➣Inter-Residence Hall Association (various universities and colleges) |
| IRHA➣Illinois Rural Health Association |
| IRHA➣Italian Reining Horse Association |
| IRHA➣Interior Regional Housing Authority |
| IRHA➣International Railway History Association |
| IRHA➣Illinois Residence Hall Association |
| IRHA➣Iowa Rural Health Association |
| IRHA➣Idaho Rural Health Association |
| IRHA➣Indian Radical Humanist Association |
| IRHA➣improved rolled homogeneous armor (steel) |
| IRHA➣Iowa Ranch Horse Association |
| IRHA➣International Rural Housing Association |
| IRHA➣Institute for Reproductive Health Access |
| IRHA➣Indiana Restaurant & Hospitality Association |
| IRHA➣Injured as Result of Hostile Action |
| IRHA➣Institute for Research in the History of Architecture |
| IRHA➣Injuries Resulting from Hostile Action |
| IRHA➣Institute for the Research in the History of Architecture |
| IRHA➣Indian Regional Housing Authorities (Alaska) |