IHA
- Hemagglutination
- Ice Hockey Australia
- Iha (disambiguation)
- Immaculate Heart Academy
- Imperial Household Agency
- Independence Hall Association
- Indian Heart Association
- Indonesia Handball Association
- Ingeniørhøjskolen i Aarhus
- Institute for Healthcare Advancement
- Intel Hub Architecture
- International Housewares Association
- International Hydropower Association
- Israel Handball Association
- İhlas News Agency