| Table ID No. | MCAG | Legal Name | Entity Name | Government Description |
| 2001 | 2070 | Rainier School District No. 307 | Rainier School District No 307 | School Districts |
| 419 | 0755 | Town of Rainier | Rainier, Town of | City/Town |
| 2002 | 1985 | Raymond School District No. 116 | Raymond School District No 116 | School Districts |
| 420 | 0552 | City of Raymond | Raymond, City of | City/Town |
| 421 | 0514 | Town of Reardan | Reardan, Town of | City/Town |
| 2003 | 2666 | Reardan-Edwall School District No. 9 | Reardan-Edwall School District No 9 | School Districts |
| 522 | S529 | Washington State Red Raspberry Commission | Red Raspberry Commission, Washington State | Commodity Commissions |
| 1524 | 1274 | Redmond Library Capital Facilities Area | Redmond Library Capital Facilities Area | Library District |
| 1730 | 0630 | Redmond Public Commission | Redmond Public Corporation | Public Development Authority |
| 422 | 0425 | City of Redmond | Redmond, City of | City/Town |
| 1266 | 0173 | Regional Water Association of South King County | Regional Water Association of South King County | Government Association |
| 1367 | 1508 | Housing Authority of the City of Renton | Renton Housing Authority | Housing Authority |
| 2004 | 1911 | Renton School District No. 403 | Renton School District No 403 | School Districts |
| 550 | S693 | Renton Technical College | Renton Technical College | Community or Technical College |
| 423 | 0428 | City of Renton | Renton, City of | City/Town |
| 2005 | 1865 | Republic School District No. 309 | Republic School District No 309 | School Districts |
| 424 | 0284 | City of Republic | Republic, City of | City/Town |
| 1368 | 0815 | Joint City of Republic-Ferry County Housing Authority | Republic-Ferry County Housing Authority | Housing Authority |
| 83 | S124 | Department of Retirement Systems | Retirement Systems, Department of | Agency, Commission, or Board |
| 84 | S140 | Department of Revenue | Revenue, Department of | Agency, Commission, or Board |
| 2284 | 2214 | Rhodena Beach Water District | Rhodena Beach Water District | Water/Sewer District |
| 1369 | 0568 | City of Richland Housing Authority | Richland Housing Authority | Housing Authority |
| 1749 | 2833 | Richland Public Facilities District | Richland Public Facilities District | Public Facilities Districts |
| 2006 | 1821 | Richland School District No. 400 | Richland School District No 400 | School Districts |
| 425 | 0207 | City of Richland | Richland, City of | City/Town |
| 2007 | 1844 | Ridgefield School District No. 122 | Ridgefield School District No 122 | School Districts |
| 426 | 0245 | City of Ridgefield | Ridgefield, City of | City/Town |
| 1682 | 1704 | Port of Ridgefield | Ridgefield, Port of | Port District (Includes Airports) |
| 1731 | 2827 | Ritzville Public Development Authority | Ritzville Public Development Authority | Public Development Authority |
| 1525 | 2773 | Ritzville Rural Library District | Ritzville Rural Library District | Library District |
| 2008 | 1812 | Ritzville School District No. 160 | Ritzville School District No 160 | School Districts |
| 427 | 0191 | City of Ritzville | Ritzville, City of | City/Town |
| 2009 | 2053 | Riverside School District No. 416 | Riverside School District No 416 | School Districts |
| 428 | 0539 | Town of Riverside | Riverside, Town of | City/Town |
| 2010 | 1915 | Riverview School District No. 407 | Riverview School District No 407 | School Districts |
| 2011 | 2072 | Rochester School District No. 401 | Rochester School District No 401 | School Districts |
| 429 | 0280 | City of Rock Island | Rock Island, City of | City/Town |
| 430 | 0720 | Town of Rockford | Rockford, Town of | City/Town |
| 2285 | 2278 | Rocky Point Water District No. 12 | Rocky Point Water District No 12 | Water/Sewer District |
| 2286 | 2142 | Ronald Wastewater District | Ronald Wastewater District | Water/Sewer District |
| 2012 | 1941 | Roosevelt School District No. 403 | Roosevelt School District No 403 | School Districts |
| 2013 | 2101 | Rosalia School District No. 320 | Rosalia School District No 320 | School Districts |
| 431 | 0823 | Town of Rosalia | Rosalia, Town of | City/Town |
| 432 | 0473 | City of Roslyn | Roslyn, City of | City/Town |
| 433 | 0600 | City of Roy | Roy, City of | City/Town |
| 434 | 0323 | City of Royal City | Royal City, City of | City/Town |
| 2014 | 1877 | Royal School District No. 160 | Royal School District No 160 | School Districts |
| 2287 | 0362 | Royal Water District | Royal Water District | Water/Sewer District |
| 1467 | 1623 | Roza Irrigation District | Roza Irrigation District | Irrigation and Reclamation District |
| 1468 | 1267 | Roza-Sunnyside Board of Joint Control | Roza-Sunnyside Board of Joint Control | Irrigation and Reclamation District |
| 435 | 0624 | Town of Ruston | Ruston, Town of | City/Town |
