| Acronym | Definition |
|---|
| ORHA➣Office of Reconstruction and Humanitarian Assistance (US government; now the Office of the Coalition Provisional Authority) |
| ORHA➣Ontario Reining Horse Association (Canada) |
| ORHA➣Oregon Rental Housing Association (Salem, OR) |
| ORHA➣Oregon Rural Health Association (Salem, OR) |
| ORHA➣Ontario Residence Hall Association |
| ORHA➣Oxford Regional Health Authority (UK) |