MHAA
| Acronym | Definition |
|---|---|
| MHAA | My Hero Academia Abridged (parody) |
| MHAA | Mental Health Association in Alaska |
| MHAA | Mid-Hudson Astronomy Association (New York) |
| MHAA | Miniature Horse Association of Australia, Inc. (est.1989) |
| MHAA | Mental Health Act Administrator (National Health Service; UK) |
| MHAA | Myanmar Health Assistant Association |
| MHAA | Manhours per Adjusted Admission (healthcare finance) |
| MHAA | Miniature Horse Association of Arizona |