IIRR
| Acronym | Definition |
|---|---|
| IIRR | International Institute for Rural Reconstruction (Philippines) |
| IIRR | Instituto Internacional de Reconstrucción Rural |
| IIRR | If I Remember Right |
| IIRR | Institut International pour la Reconstruction Rurale |
| IIRR | Incident Investigation, Recording & Reporting |
| IIRR | Initial Investment Rate of Return |
| IIRR | Iranian Islamic Republic Railway |