| Abbreviation | Definition |
|---|---|
| IRDA | Indian Runner Duck Association |
| IRDA | Infra Red Data Association |
| IRDA | International Reconstruction and Development Association |
| IREA | Illinois Renewable Energy Association |
| IREA | Indian River Education Association |
| IREA | Intermountain Rural Electric Association |
| IRELA | Illinois Real Estate Lawyers Association |
| IRFA | Iowa Renewable Fuels Association |
| IRGA | Independent Retail Grocers Association |
| IRIA | Indian Radiological and Imaging Association |
| IRIA | International Rescue Instructors Association |
| IRLA | International Release Liner Association |
| IRLA | International Religious Liberty Association |
| IRMA | Illinois Retail Merchants Association |
| IRMA | Indian Refractory Makers Association |
| IRMA | International Regional Magazine Association |
| IRNA | Indian River Neighborhood Association |
| IRNA | Internet Recruiters Network and Association |
| IRPA | International Radiation Protection Association |
| IRPA | International Relations Politics Association |