| Acronym | Definition |
|---|
| IRA | Irish Republican Army |
| IRA | Individual Retirement Arrangement (IRS) |
| IRA | Individual Retirement Account |
| IRA | International Reading Association |
| IRA | Indian Reorganization Act |
| IRA | Import Risk Analysis |
| IRA | Individual Retirement Annuity (life insurance) |
| IRA | Internal Revenue Allotment (Philippines) |
| IRA | Intercollegiate Rowing Association |
| IRA | Iran Air (ICAO code) |
| IRA | International Reference Alphabet (7-bit coded character set) |
| IRA | Inherited Runs Allowed (baseball pitching statistic) |
| IRA | Interim Remedial Action |
| IRA | Ileorectal Anastomosis |
| IRA | Irregular Repeat-Accumulate (coding scheme) |
| IRA | Import Risk Assessment |
| IRA | Illinois Restaurant Association |
| IRA | Inventory Record Accuracy |
| IRA | Illinois Recycling Association (formerly Illinois Association of Recycling Centers) |
| IRA | Indian Removal Act of 1830 |
| IRA | Investor Rights Agreement |
| IRA | Individualized Residential Alternative (New York) |
| IRA | Institut de Recherche Aérospatiale (French) |
| IRA | Integrated Risk Assessment |
| IRA | Immediate Response Account |
| IRA | Independent Regulatory Agency |
| IRA | Institut de Radiophysique Appliquée |
| IRA | Impulse Radiating Antenna |
| IRA | Informal Rate Agreement |
| IRA | Institut de Recherche Agronomique (Cameroon) |
| IRA | Interim Removal Action |
| IRA | International Racing Association |
| IRA | Interim Response Action |
| IRA | Inverness Royal Academy |
| IRA | Institutional Research Award (NASA) |
| IRA | Independent Research Agency |
| IRA | Internet Routing Address |
| IRA | Information Research Associates |
| IRA | Intelligence Related Activity |
| IRA | Independent Reporting Activity |
| IRA | Information Requirement Analysis |
| IRA | Indiana Rehabilitation Association |
| IRA | Iterative Refinement Algorithm |
| IRA | Internal Revenue Association |
| IRA | Interface Requirements Analysis |
| IRA | Intelligent Reuse Advisor (CASE) |
| IRA | Intercon Research Associates |
| IRA | International Reiki Alliance |
| IRA | Initial Request Analysis |
| IRA | Inspection Régionale de l'Agriculture (French: Regional Agriculture Inspection; Senegal) |
| IRA | Item and Release Application |
| IRA | International Roaming Agreement (telephone networks) |
| IRA | Interrogation Réponse Aéronautique (French: Aeronautics Interrogation Response; Directorate of Civil Aviation; France) |
| IRA | Information Retrieval for Advertising (workshop) |