IEA can stand for several different things, such as those listed here:
- Institute of Economic Affairs
- Institute of International and European Affairs, formerly the Institute of European Affairs
- Institute of Ethnology and Anthropology, Moscow
- International Association for the Evaluation of Educational Achievement
- International Epidemiological Association
- International Ergonomics Association
- Islamic Emirate of Afghanistan
- International Energy Agency established in the framework of the Organisation for Economic Co-operation and Development (OECD) in 1974