| Abbreviation | Definition |
|---|---|
| IYO | Indian Youth Organisation |
| IYO | International Youth Organization |
| J | Jesmion |
| JA | Jamaica Awareness |
| JAAN | Jakarta Animal Aid Network |
| JAARS | Jungle Aviation And Radio Service |
| JAAWS | Journal of Applied Animal Welfare Science |
| JACL | Japanese American Citizens League |
| JACTO-GEO | Joint Action Committee of Teachers Organization - Government Employees Organization |
| JAF | Joni And Friends |
| JAFB | Journalist Alliance Foundation of Bangladesh |
| JAFCO | Jewish Adoption and Foster Care Options, Inc. |
| JAFI | Jewish Agency For Israel |
| JAG | Jeunesse Associative Godewaersveldoise |
| JAHC | Jackson Affordable Housing Corporation |
| JAHC | Jobs and Affordable Housing Campaign |
| JAHC | Johnny Appleseed Heritage Center |
| JAHC | Juneau Arts and Humanities Council |
| JAI | Junior Achievement, Inc. |
| JAINTL | Junior Achievement International |