| City | County | 2026 Pop. ↓ |
|---|---|---|
| Renton | King County | 104,437 |
| Redmond | King County | 84,515 |
| Richland | Benton County | 66,182 |
| Ridgefield | Clark County | 17,241 |
| Rochester | Thurston County | 6,864 |
| Rosedale | Pierce County | 4,318 |
| Raymond | Pacific County | 3,266 |
| Rainier | Thurston County | 2,523 |
| Riverbend | King County | 2,154 |
| Royal City | Grant County | 1,927 |
| Rock Island | Douglas County | 1,858 |
| Ritzville | Adams County | 1,705 |
| Rocky Point | Kitsap County | 1,667 |
| Riverpoint | King County | 1,209 |
| River Road | Clallam County | 1,067 |
| Ruston | Pierce County | 1,050 |
| Republic | Ferry County | 1,025 |
| Roslyn | Kittitas County | 961 |
| Roche Harbor | San Juan County | 862 |
| Roy | Pierce County | 790 |
| Reardan | Lincoln County | 707 |
| Rockford | Spokane County | 656 |
| Rosalia | Whitman County | 568 |
| Rosburg | Wahkiakum County | 503 |
| Ryderwood | Cowlitz County | 361 |
| Riverside | Okanogan County | 346 |
| Raft Island | Pierce County | 341 |
| Ronald | Kittitas County | 234 |
| Roosevelt | Klickitat County | 166 |
| Ravensdale | King County | 125 |
| Rockport | Skagit County | 49 |