| Abbreviation | Definition |
|---|---|
| RID | Roza Irrigation District ( Washington) |
| RIDH | Rhode Island Department of Health |
| RIFH | The Raise it for Health Coalition (Minnesota) |
| RIMS | Riverside, Inyo, Mono, San Bernardino |
| RINO | Republicans In Name Only |
| RISE | Revitalize Iowa's Sound Economy |
| RIWRB | Rhode Island Water Resources Board |
| RKE | Roanoke, Virginia |
| RKV | Rockville, Maryland |
| RKYMTN | Rocky Mountain |
| RLD | Red Light District |
| RLF | Red Lake Falls |
| RLJ | Rancho La Joya |
| RLQ | Rancho La Querencia |
| RLRC | Rose Lake Research Center |
| RMA | Risk Management Agency |
| RMD | Rocky Mountain District |
| RMNP | Rocky Mountain National Park |
| RMSW | Residual Municipal Solid Waste |
| RMY | Regional Municipality of York (Ontario, Canada) |