MHSAA
| Acronym | Definition |
|---|---|
| MHSAA | Michigan High School Athletic Association |
| MHSAA | Manitoba High Schools Athletic Association (Canada) |
| MHSAA | Milton Hershey School Alumni Association (Pennsylvania) |
| MHSAA | Milan High School Alumni Association (Tennessee) |
| MHSAA | Madison High School Alumni Association (Tennessee) |
| MHSAA | MacDonald High School Alumni Association (Canada) |