31 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Renton | King County | 105,245 |
| Redmond | King County | 84,400 |
| Richland | Benton County | 65,242 |
| Ridgefield | Clark County | 16,480 |
| Rochester | Thurston County | 6,585 |
| Rosedale | Pierce County | 4,301 |
| Raymond | Pacific County | 3,261 |
| Rainier | Thurston County | 2,536 |
| Riverbend | King County | 2,153 |
| Royal City | Grant County | 1,937 |
| Rock Island | Douglas County | 1,830 |
| Ritzville | Adams County | 1,700 |
| Rocky Point | Kitsap County | 1,661 |
| Riverpoint | King County | 1,133 |
| Ruston | Pierce County | 1,046 |
| Republic | Ferry County | 1,029 |
| River Road | Clallam County | 1,029 |
| Roslyn | Kittitas County | 959 |
| Roche Harbor | San Juan County | 808 |
| Roy | Pierce County | 798 |
| Reardan | Lincoln County | 697 |
| Rockford | Spokane County | 652 |
| Rosalia | Whitman County | 574 |
| Rosburg | Wahkiakum County | 491 |
| Ryderwood | Cowlitz County | 363 |
| Raft Island | Pierce County | 348 |
| Riverside | Okanogan County | 344 |
| Ronald | Kittitas County | 239 |
| Ravensdale | King County | 186 |
| Roosevelt | Klickitat County | 165 |
| Rockport | Skagit County | 52 |