NIAD
| Acronym | Definition |
|---|---|
| NIAD | National Institution for Academic Degrees (now National Institution for Academic Degrees and University Evaluation; Japan) |
| NIAD | National Iguana Awareness Day |
| NIAD | National Institute of Art & Disabilities (Richmond, CA, USA) |
| NIAD | Nose-in-a-Day (climbing El Capitan in under 24 hours) |
| NIAD | Norfolk Institute of Art and Design (now Norwich School of Art and Design; UK) |
| NIAD | Net Income Adjusted for Depreciation |