| Acronym | Definition |
|---|
| HIA | Head of Internal Audit (various locations) |
| HIA | Housing Industry Association (Australia) |
| HIA | Health Impact Assessment |
| HIA | Head Inury Assessment (concussion test; rugby) |
| HIA | Høgskolen I Agder |
| HIA | Hot Ion Analyzer |
| HIA | Health Insurance Authority (regulatory body; Ireland) |
| HIA | Health in Action (various locations) |
| HIA | Historic Inns of Annapolis (Annapolis, MD) |
| HIA | Herzberg Institute of Astrophysics (Canada) |
| HIA | Hemp Industries Association |
| HIA | Halls Internet Access |
| HIA | Holographic Imaging Apparatus |
| HIA | Hyogo International Association (Japan) |
| HIA | Here I Am |
| HIA | Home Improvement Agency (United Kingdom) |
| HIA | Hearing Industries Association |
| HIA | Health Information Act (Canada) |
| HIA | Hobby Industry Association |
| HIA | Health Insurance Associate |
| HIA | Hungarian Interchurch Aid |
| HIA | Hoover Institution Archive (Hoover Institution; Stanford University) |
| HIA | Hand Immobilization Attack |
| HIA | Hazard Identification and Analysis Unit |
| HIA | Health Investment Account |
| HIA | Hettesheimer Insurance Agency (Ohio) |
| HIA | Harmful Interference Anticipated (engineering study; Canada) |
| HIA | Host Interface Adapter |
| HIA | Hague Invasion Act (2002) |
| HIA | Helmholtz-Institute for Biomedical Engineering, Aachen (Aachen University, Aachen, Germany) |
| HIA | Hispanic Influencer Alliance |
| HIA | Horizontal Impulse Accelerator |
| HIA | Highest Interference Algorithm |
| HIA | Held/Hold In Abeyance |
| HIA | Harrisburg International Airport, Harrisburg, Pennsylvania (Airport Code) |