| Acronym | Definition |
|---|
| IGRA | Interferon Gamma Release Assay (blood test) |
| IGRA | International Gay Rodeo Association (Denver, CO) |
| IGRA | Indian Gaming Regulatory Act of 1988 (US) |
| IGRA | International Green Roof Association (Berlin-Pankow, Germany) |
| IGRA | Integrated Global Radiosonde Archive (US NOAA) |
| IGRA | Icaza, Gonzalez-Ruiz & Aleman (Attorneys-at-Law, Panama City) |
| IGRA | International Guitar Research Archive |
| IGRA | Institute of Greek and Roman Antiquity (Athens, Greece) |
| IGRA | Iowa Good Roads Association (Des Moines, Iowa) |
| IGRA | Independent Gospel Rap Alliance |
| IGRA | International Geopolitics Reporters Association (est. 1990) |