IRWA
| Acronym | Definition |
|---|---|
| IRWA | International Right of Way Association |
| IRWA | Ipswich River Watershed Association (Ipswich, MA) |
| IRWA | Iowa Rural Water Association |
| IRWA | Illinois Rural Water Association |
| IRWA | Idaho Rural Water Association |
| IRWA | Indiana Romance Writers of America (Noblesville, IN) |