IEA may refer to:
- Institute of Economic Affairs
- Institute of International and European Affairs, formerly the Institute of European Affairs
- N.N. Miklukho-Maklai Institute of Ethnology and Anthropology, Moscow
- International Association for the Evaluation of Educational Achievement
- International Epidemiological Association
- International Energy Agency, a Paris-based organization established by the OECD in 1974
- International Ergonomics Association
- Instituto Español de Andorra, a Spanish international school in Andorra
- Islamic Emirate of Afghanistan
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