IEA
- Afghanistan
- Indian Evidence Act, 1872
- Institute of Economic Affairs
- Institute of Ethnology and Anthropology
- Institute of International and European Affairs
- Instituto Español de Andorra
- International Association for the Evaluation of Educational Achievement
- International Energy Agency
- International Epidemiological Association
- International Ergonomics Association
- Involuntary Emergency Admission
- Islamic Emirate of Afghanistan (1996–2001)