| Abbreviation | Definition |
|---|---|
| IDBC | Illawarra Dragon Boat Club |
| IDRC | International Dressage Riders Club |
| IDTC | International Dressage Trainer Club |
| IDTC | International Dressage Trainers Club |
| IDTC | Ithaca Dog Training Club |
| IEBC | Inland Empire Bass Club |
| IEMC | Inland Empire Mustang Club |
| IERC | Inland Empire Running Club |
| IFC | Imx Fan Club |
| IFCA | International Forza Club Association |
| IFCO | International Fan Club Organization |
| IFFC | International Flat Fender Club |
| IFFC | International Friendship Football Club |
| IGAD | I Get A Drink |
| IHAC | Internationale Historische Automobiel Club |
| IHAC | Iron Horse Athletic Club |
| IHC | Ice Hockey Club |
| IHDC | Iver Heath Drama Club |
| IKC | International Kennel Club |
| IKC | International Kiddush Club |