| Acronym | Definition |
|---|
| IEA | International Energy Agency |
| IEA | International Environmental Agreements |
| IEA | International Association for the Evaluation of Educational Achievement |
| IEA | International Ergonomics Association |
| IEA | Institute of Economic Affairs |
| IEA | Inferred from Electronic Annotation |
| IEA | Illinois Education Association (Springfield, IL) |
| IEA | Insurance Educational Association |
| IEA | Irish Exporters' Association |
| IEA | International Epidemiological Association |
| IEA | International Economic Association |
| IEA | Idaho Education Association |
| IEA | Illuminating Engineering Society |
| IEA | Institute of Ethnology and Anthropology |
| IEA | Islamic Emirate of Afghanistan |
| IEA | Institute for Educational Advancement |
| IEA | Industrial Environmental Association |
| IEA | Integrated Equipment Assembly (NASA) |
| IEA | Information Exchange Agreements |
| IEA | Immigration Enforcement Agent |
| IEA | Institute of Educational Assessors |
| IEA | Integrated Electronics Assembly |
| IEA | Involuntary Emergency Admission |
| IEA | International Exhibitors Association |
| IEA | Initial Environmental Assessment |
| IEA | Information Exchange Annex |
| IEA | Indian Epilepsy Association |
| IEA | Instituto de Estudos Amazonicos E Ambientais (Portuguese: Institute of Amazon and Environmental Studies) |
| IEA | Independent Energy Agency (UK) |
| IEA | International Endometriosis Association |
| IEA | Integrated Engineering Assessment |
| IEA | Interscholastic Equestrian Association, Inc. |
| IEA | Internet Ethics Association |
| IEA | Ingeniero Especialista Aeronáutico (Colombia) |
| IEA | Independent Executive Agency |
| IEA | Interconnector Error Administrator (electrical utility industry) |
| IEA | Integrated Ecosystem Assessment (US NOAA) |
| IEA | Information Enterprise Architecture Group (New York Life Insurance Company) |
| IEA | Institute for Environmental Assessment, Inc. (est. 1984; various locations) |