| IRRA | Industrial Relations and Research Association | 劳资关系与研究协会 |
| IRRA | International Retro Racing Association | 国际复古赛车协会 |
| IRRA | Industrial Relations Research Association | 工业关系研究协会 |
| IRRA | International Resort and Retailers Association | 国际度假村和零售商协会 |
| IRRA | Integrated Radio Resource Allocation | 综合无线电资源分配 |
| IRRA | Institutional Repositories and Research Assessment (UK) | 机构存储库和研究评估（英国） |
| IRRA | Individual Retirement Rollover Account (financial) | 个人退休滚动账户（财务） |
| IRRA | Institute for Reliability and Risk Analysis | 可靠性和风险分析研究所 |