| Acronym | Definition |
|---|
| MHA | Mental Health America |
| MHA | Mental Health Association |
| MHA | Ministry of Home Affairs |
| MHA | Mississippi Hospital Association (Madison, MS) |
| MHA | Merritt Hawkins & Associates (Irving, TX) |
| MHA | Michigan Health & Hospital Association |
| MHA | Mental Health Authority |
| MHA | Mental Health Advocate |
| MHA | Minnesota Multi Housing Association (also seen as MMHA; est. 1967; trade association) |
| MHA | Member of the House of Assembly (Newfoundland, Canada) |
| MHA | Masters of Health Administration |
| MHA | Microangiopathic Hemolytic Anemia |
| MHA | Masters of Healthcare Administration |
| MHA | Mental Health and Aging |
| MHA | May-Hegglin Anomaly |
| MHA | Malaysian Highway Authority |
| MHA | Masonry Heater Association |
| MHA | Minimum Holding Altitude |
| MHA | Mental Health Aide |
| MHA | Association of Maryland Hospitals & Health Systems |
| MHA | Magnetic Head Assembly (computer hard drives) |
| MHA | Mobile Humic Acid |
| MHA | Masthead Amplifier |
| MHA | Medal for Humane Action |
| MHA | Atlantic Menhaden (FAO fish species code) |
| MHA | Maximum Hypothetical Accident |
| MHA | Mage Hunter Assassin (gaming; Warmachine) |
| MHA | Canadian Malignant Hyperthermia Association |
| MHA | Michigan Horseshoers Association |
| MHA | Model Hovercraft Association |
| MHA | Molokai Hunters Association |
| MHA | Motor Home Class A |
| MHA | Man-Hour Accounting |
| MHA | Missouri Hereford Association |
| MHA | Macdonald Harris & Associates Ltd. |
| MHA | Mental Hygiene Arrest |
| MHA | Methionine Hydroxyl Analog |
| MHA | Malaysia Hockey Association |
| MHA | Milt Hinton Award |
| MHA | Masters of Historical Administration |
| MHA | Murray Hershman & Associates, Inc. |
| MHA | Mobile Handset Antenna |
| MHA | Maritime History Archive (Memorial University of Newfoundland; Canada) |
| MHA | Mueller-Hinton Agar (microbiology) |