IFF
- Autodesk Media and Entertainment
- Claude Iff
- Faculty for Interdisciplinary Research and Continuing Education
- Fédération Internationale d'Escrime
- IF2 (disambiguation)
- IIF (disambiguation)
- Identification friend or foe
- If (disambiguation)
- If and only if
- Iff card
- Iffs (disambiguation)
- Illicit financial flows
- Independent Fianna Fáil
- Indonesian Film Festival
- Institute For Figuring
- Interchange File Format
- International Federation of Factory Workers
- International Finance Facility
- International Floorball Federation
- International Freedom Foundation
- International film festival
- Irish Fencing Federation
- Ischia Film Festival
- John Hunt Publishing
- List of The Expanse episodes
- Patricia A. McKillip bibliography
- Simon Iff
- Simone Iff
- Utaha language