IEH

IEH may refer to:


 * Institute of Experimental History, a fictional organization in the Noon Universe fictional setting
 * IEH, a signature used by Johan Engholm
 * International Environment House, base of the Geneva Environment Network Secretariat
 * International Extreme Ultraviolet Hitchhiker payloads carried in the payload bay of STS-69 and later space shuttle missions
 * Common prefix for system utility programs in IEFBR14
 * Institute of Electric Energy Systems and High-Voltage Technology at the Karlsruhe Institute of Technology