HNHS
| Acronym | Definition |
|---|---|
| HNHS | Huntington North High School (Huntington, IN) |
| HNHS | Hellenic Navy Hydrographic Service (Cholargos, Greece) |
| HNHS | Holy Name High School (Parma Heights, OH) |
| HNHS | Havelock North High School (Havelock North, New Zealand) |
| HNHS | Humber Natural History Society (Newfoundland and Labrador, Canada) |
| HNHS | Hampton National Historic Site (Towson, MD; USPS) |