ILF
- Fleshlight
- Ilford Airport
- Ilya Ilf
- Indiana Library Federation
- Inferior longitudinal fasciculus
- Innocent Lives Foundation
- Institute for Law and Finance
- International AIDS Society
- International Lacrosse Federation
- International Landworkers' Federation
- International Literacy Foundation
- International Maritime Rescue Federation
- Islamabad Literature Festival
- Johann Wolfgang Goethe University Frankfurt am Main