| Abbreviation | Definition |
|---|---|
| IBSF | International Bobsleigh and Skeleton Federation |
| IBSF | International Bobsleigh Skeleton Federation |
| IBTF | International Baton Twirling Federation |
| ICBF | Irish Cattle Breeding Federation |
| ICCF | International Cane Corso Federation |
| ICCF | International Classic Cosmoenergy Federation |
| ICF | International Coach Federation |
| ICF | International Coaching Federation |
| IDBF | International Dragon Boat Federation |
| IDDF | International Double Dutch Federation |
| IDF | International Dance Federation |
| IDF | International Diving Federation |
| IDF | International Downhill Federation |
| IDF | International Draughts Federation |
| IDGF | International Desktop Grid Federation |
| IDI | International Diabetes Federation, Western Pacific Region |
| IDRF | Indonesia Drone Racing Federation |
| IDWF | International Domestic Workers Federation |
| IEFF | International Esport Football Federation |
| IFA | International Federation on Ageing |