IES

The acronym IES can stand for:

Government organizations

• Indian Economic Service
• Indian Education Service, in British India
• Institute for Environment and Sustainability of the European Commission
• Institute of Education Sciences

Non-profit organizations

• 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

Companies

• Internationella Engelska Skolan
• IES Ltd (Integrated Export Systems), a transportation software company
• Integrated Electrical Services, Inc

Other

• Indian Engineering Services
• Integrated Encryption Scheme, in cryptography, a public key cryptosystem
• Intertemporal elasticity of substitution
• Impact of Events scale