| Abbreviation | Definition |
|---|---|
| IAF | International Apparel Federation |
| IAF | International Astronautical Federation |
| IAF | International Of Anarchist Federations |
| IAFF | Irish Amateur Fencing Federation |
| IAFO | Ibero American Federation of Ombudsmen |
| IAMTF | International Amateur Muay Thai Federation |
| IAWF | Illinois Animal Welfare Federation |
| IBBF | Indian Body Builders Federation |
| IBDF | International Budo Do Federation |
| IBF | International Basketball Federation |
| IBF | International Bowling Federation |
| IBF | Irish Bankers' Federation |
| IBF | Irish Banking Federation |
| IBFF | Indian Blind Football Federation |
| IBFF | Intercontinental Bodybuilding Fitness Federation |
| IBFF | International Bodybuilding Fitness Federation |
| IBJJF | International Brazilian Jiu Jitsu Federation |
| IBSF | International Billiard Snooker Federation |
| IBSF | International Billiards and Snooker Federation |
| IBSF | International Billiards Snooker Federation |