SMHN
| Acronym | Definition |
|---|---|
| SMHN | Servicios Meteorológicos e Hidrológicos Nacionales (Spanish: National Meteorological and Hydrological Services; World Meteorological Organization) |
| SMHN | Southern Maryland Homeschool Network |
| SMHN | Service Manager Housing Network (Canada) |
| SMHN | Sandy Mush Herb Nursery (Leicester, NC) |