IYF
| Acronym | Definition |
|---|---|
| IYF | International Youth Fellowship (various locations) |
| IYF | International Youth Forum (various organizations) |
| IYF | International Youth Foundation |
| IYF | In Your Face |
| IYF | Is Your Friend (computer geek slang) |
| IYF | International Year of Freshwater (UN) |
| IYF | Insert Your Favorite... (fill in the blank) |
| IYF | It's Your Fault |
| IYF | ISKCON (International Society for Krishna Consciousness) Youth Forum (religious organization) |