| Acronym | Definition |
|---|
| IECA | International Erosion Control Association |
| IECA | Independent Educational Consultants Association |
| IECA | International Energy Credit Association |
| IECA | Instituto Español del Cemento y sus Aplicaciones (Madrid, Spain) |
| IECA | Intercounty Electric Cooperative Association |
| IECA | Interim External Certificate Authority |
| IECA | International Electronic Communication Analysts, Inc. (incorporated in 1996) |
| IECA | Instituto Educacional Castro Alves |
| IECA | Reformed Evangelical Church of Angola |
| IECA | Inhibidor del Enzima Conversor de la Angiotensina (Spanish: Angiotensin Converter Enzyme Inhibitor) |
| IECA | Information, Education and Communication Advocacy (reproductive health) |