| Abbreviation | Definition |
|---|---|
| IFG | International Festival Of Glass |
| IFOL | International Festival of Life |
| IFOL | International Festival of Lights |
| IGF | Independent Games Festival |
| IICF | Idaho International Choral Festival |
| IICF | India International Coffee Festival |
| IIMF | Indonesia International Mask Festival |
| IJAF | International Junior Art Festival |
| IJF | International Jazz Festival Prague (Prague, Czech Republic; annual jazz music festival) |
| IJLF | International Jazz Live Festival |
| IKL | Internationaal Kortfilmfestival Leuven |
| ILF | Indian Languages Festival |
| ILFD | International Literature Festival Dublin |
| IMAF | International Martial Arts Festival |
| IMAF | International Multimedial Art Festival |
| IMFA | International Music Festival of the Adriatic |
| IMFC | International Music Festival and Competition |
| IMLF | International Mobile Learning Festival |
| IMSFF | Independent Mzansi Short Film Festival |
| IPAF | International Public Art Festival |