ISHS
| Acronym | Definition |
|---|---|
| ISHS | International Society for Horticultural Science |
| ISHS | Illinois State Historical Society |
| ISHS | International Society for Humor Studies |
| ISHS | Independent Study High School |
| ISHS | International School for Holocaust Studies (Yad Vashem; Israel) |
| ISHS | Idaho State Horticultural Society |