The acronym IES can stand for:
- Indian Economic Service
- Indian Education Service, in British India
- Institute for Environment and Sustainability of the European Commission
- Institute of Education Sciences
- Institute for the International Education of Students
- Illuminating Engineering Society of North America
- International Enterprise Singapore
- Israel Exploration Society
- Institution of Environmental Sciences
- International Euphorbia Society
- Internationella Engelska Skolan
- IES Ltd (Integrated Export Systems), a transportation software company
- Integrated Electrical Services, Inc
- Indian Engineering Services
- Integrated Encryption Scheme, in cryptography, a public key cryptosystem
- Intertemporal elasticity of substitution
- Impact of Events scale
n. (context rare English) (plural of i English), the name of the letter I.
Usage examples of "ies".
Even among clans of our own Civilization of Five Galax ies, we have seen a rise of religious fervor.