IISD
| Acronym | Definition |
|---|---|
| IISD | International Institute for Sustainable Development |
| IISD | Irving Independent School District (Irving, Texas) |
| IISD | International Indian School, Dammam (India) |
| IISD | International Institute for Sustained Dialogue (Washington, DC) |
| IISD | Ingham Intermediate School District (Mason, MI) |
| IISD | International Industrial Security Directorate (Canada) |