HHMS
| Acronym | Definition |
|---|---|
| HHMS | Hammond High Magnet School (Hammond, LA) |
| HHMS | Hamilton Heights Middle School (Arcadia, IN) |
| HHMS | Herbert Hoover Middle School |
| HHMS | Highland Hills Middle School (Georgetown, IN) |
| HHMS | Hellenic Homeopathic Medical Society (est. 1971; Athens, Greece) |
| HHMS | Hex-Head Machine Screw (parts lists) |