| Abbreviation | Definition |
|---|---|
| ICFL | Inter County Football League |
| IEFF | International Esport Football Federation |
| IFA | Irish Football Association |
| IFAB | International Football Association Board |
| IFBI | International Football Business Institute |
| IFCA | Indiana Football Coaches Association |
| IFCA | Iowa Football Coaches Association |
| IFFA | Indonesian Flag Football Association |
| IFFA | International Federation of Football Association |
| IFFA | Iranian Football Fans Association |
| IFFL | International Friendship Football League |
| IFL | ICAW Football League |
| IFL | Indoor Football League |
| IFL | Ironman Football League |
| IFO | Independent Football Ombudsman |
| IFOA | Indiana Football Officials Association |
| IFOA | Inland Football Officials Association |
| IFTO | International Football Tournament Organisation |
| IKFA | Iraqi Kurdistan Football Association |
| INFC | Indian Nation Football Conference |