| Acronym | Definition |
|---|
| IHH | Insani Yardim Vakfi (Turkish: Humanitarian Foundation) |
| IHH | Indian Hedgehog (chromosome) |
| IHH | Idiopathic Hypogonadotropic Hypogonadism (sexual development) |
| IHH | Institute for Health and Healing (California Pacific Medical Center) |
| IHH | Institute for Hispanic Health (National Council for La Raza) |
| IHH | International Humanitaire Hilfsorganization (German: International Humanitarian Auxiliary Organization; various locations) |
| IHH | Inner Harbour Hospital (Douglasville, GA) |
| IHH | Independent Holiday Hostels in Ireland |
| IHH | Integris Heart Hospital (Oklahoma City, OK) |