| Acronym | Definition |
|---|
| IHA | International Hydropower Association (UK) |
| IHA | Incidental Harassment Authorization (US NOAA) |
| IHA | Integrated Healthcare Association (Walnut Creek, CA) |
| IHA | I'll Have Another (racehorse) |
| IHA | Intel Hub Architecture |
| IHA | International Housewares Association |
| IHA | Interior Health Authority (Health Board of the interior section of British Columbia, Canada) |
| IHA | Iowa Hospital Association |
| IHA | Independence Hall Association (est. 1942; Philadelphia, PA) |
| IHA | Institute for Healthcare Advancement (La Habra, CA) |
| IHA | Institut Herzberg d'astrophysique |
| IHA | Ihlas Haber Ajansi (news agency in Turkey) |
| IHA | International Huntington Association |
| IHA | Immaculate Heart Academy |
| IHA | Internet Home Alliance |
| IHA | Inline Hockey Association (Colorado Springs, CO) |
| IHA | I Hate Acronyms :-) |
| IHA | International Hotel Association |
| IHA | Indian Housing Authorities |
| IHA | Imperial Household Agency (Japan) |
| IHA | Institute for Health & Aging (University of California, San Francisco) |
| IHA | Ice Hockey Australia (governing body of Australian ice hockey) |
| IHA | Independent Homeworkers Alliance |
| IHA | Ithaca Health Alliance |
| IHA | Iranian Homeopathic Association |
| IHA | Indirect Hemagglutination Antibody |
| IHA | Indirect Hire Agreement |
| IHA | Irresponsible Hate Anthem (Marilyn Manson song) |
| IHA | Integrated High Availability (trademark of Resilience Corp.) |
| IHA | Interim Housing Allowance |
| IHA | I Have Available |
| IHA | Idaho Hay Association Inc. |
| IHA | Improved Hybrid Algorithm |
| IHA | Interstate Highway Act of 1956 |