HYAA
| Acronym | Definition |
|---|---|
| HYAA | Hillsborough Youth Athletic Association (Hillsborough, NC) |
| HYAA | Hastings Youth Athletic Association (est. 1982; Hasting, MN) |
| HYAA | Hooksett Youth Athletic Association |
| HYAA | Holmdel Youth Athletic Association (Holmdel, New Jersey) |
| HYAA | Hydride Atomic Absorption |