| Acronym | Definition |
|---|
| INWR➣Iroquois National Wildlife Refuge (US FWS; New York) |
| INWR➣International Network for Whaling Research (est. 1990; University of Alberta; Edmunton, Alberta, Canada) |
| INWR➣Imperial National Wildlife Refuge (Yuma County, AZ) |
| INWR➣Irish North Western Railway (est. 1862) |
| INWR➣Inland Northwest Rescue |
| INWR➣Izembek National Wildlife Refuge (US FWS; Alaska) |