| Abbreviation | Definition |
|---|---|
| IRFA | Institutional Religious Freedom Alliance |
| IRIA | International Rescue Instructors Alliance |
| ISAA | Idaho Second Amendment Alliance |
| ISDA | International Sonoran Desert Alliance |
| ISFA | Indiana Smoke Free Alliance |
| ISGA | International School Grounds Alliance |
| ISGA | International Soybean Growers Alliance |
| ITDA | Illinois Technology Development Alliance |
| ITRA | International Tenant Representative Alliance |
| IUCA | International Universities Climate Alliance |
| IVA | Infinity Vision Alliance |
| IVOA | International Virtual Observatory Alliance |
| IWSA | International Woman Suffrage Alliance |
| JAA | Jewish Abilities Alliance |
| JACB | Jagged Alliance Collectors Bundle |
| JACCO | Japanese Alliance for Climate Change Observation |
| JAFB | Journalist Alliance Foundation of Bangladesh |
| JASA | Japan-America Security Alliance |
| JBRA | Jervis Bay Regional Alliance (Huskisson, NSW, Australia) |
| JCAL | Jewish Community Alliance of Lancaster |