IHI can refer to:

• Ifakara Health Institute, a health research organization in Tanzania

• Information Holdings Inc., part of the Thomson Corporation since 2004

• IHI Corporation, formerly known as Ishikawajima-Harima Heavy Industries, a Japanese manufacturing company

• Ice Hockey Iceland, ÍHÍ (Icelandic: Íshokkísamband Íslands)

• Innovative Health Initiative Joint Undertaking (IHI), a European Union pharmaceutical research initiative

See also

• Ihi, a ceremonial marriage ritual in Nepal

• Ihi (goddess), the goddess of wisdom and learning in Tahitian mythology