| Abbreviation | Definition |
|---|---|
| IFCB | International Fitness Convention Bulgaria |
| IFK | International Federation of Karate |
| IFMAR | International Federation of Model Automobile Racing |
| IFMGA | International Federation of Mountain Guides Associations |
| IFNA | International Federation Netball Association |
| IFOA | Indiana Football Officials Association |
| IFOA | Inland Football Officials Association |
| IFR | International Finals Rodeo |
| IFS | International Figure Skating |
| IFS | International Free Stylers |
| IFSA | International Free Skiers Association |
| IFSA | International Freestyle Sports Association |
| IFSC | International Federation of Sport Climbing |
| IFSM | Indian Federation of Sports Medicine |
| IFSM | International Federation of Sports Medicine |
| IFSP | International Federation of Sports Physiotherapy |
| IG | Ice Gaming |
| IG | In Game |
| IG | Interactive Glide |
| IG | International Golf |