| Abbreviation | Definition |
|---|---|
| IYB | Interior Youth Basketball |
| IYB | International Youth Basketball |
| IYB | Ithaca Youth Bureau |
| IYB | Ixonia Youth Baseball |
| IYC | Ijaw Youth Congress |
| IYC | Ijaw Youth Council |
| IYC | Illinois Youth Center |
| IYC | Immigrant Youth Coalition |
| IYC | IMPACT Youth Club |
| IYC | Indian Youth Congress |
| IYC | Indigenous Youth Council |
| IYC | International Youth Centre |
| IYC | International Youth Committee |
| IYC | International Youth Convention |
| IYC | Iowa Youth Congress |
| IYCE | Innovations for Youth Capacity and Engagement |
| IYCE | Institute for Youth and Community Engagement |
| IYD | Indonesian Youth Diplomacy |
| IYD | Indonesian Youth Dream |
| IYD | International Youth Day |