IHI

IHI can refer to:
 * Ifakara Health Institute, a health research organization in Tanzania
 * Information Holdings Inc., part of The Thomson Corporation since 2004
 * Institute for Healthcare Improvement
 * IHI Corporation, formerly known as Ishikawajima-Harima Heavy Industries, a Japanese company which produces ships, aero-engines, and other machinery
 * Ice Hockey Iceland, ÍHÍ (Icelandic: Íshokkísamband Íslands)