IFK
| Acronym | Definition |
|---|---|
| IFK | Indirect Free Kick (Soccer) |
| IFK | International Federation of Karate |
| IFK | Idrotts Föreningen Kamraterna (Swedish: Sport Club Comrades) |
| IFK | Interessenverband Freiberuflicher Krankengymnastinnen (Syndicate of Freelance Physiotherapists, Germany; today: Bundesverband Selbstständiger Physiotherapeuten) |
| IFK | Institut Fuer Kernphysik (Germany) |
| IFK | Insect Flying Killer (band) |
| IFK | Installationsfragen-Kommission (German) |