24 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Federal Way | King County | 95,509 |
| Frederickson | Pierce County | 26,246 |
| Five Corners | Clark County | 21,605 |
| Fairwood | King County | 18,490 |
| Ferndale | Whatcom County | 16,571 |
| Fort Lewis | Pierce County | 14,038 |
| Felida | Clark County | 11,304 |
| Fairwood | Spokane County | 10,809 |
| Fife | King County | 10,495 |
| Fircrest | Pierce County | 6,774 |
| Finley | Benton County | 5,807 |
| Fox Island | Pierce County | 3,647 |
| Forks | Clallam County | 3,446 |
| Fairchild AFB | Spokane County | 3,286 |
| Fobes Hill | Snohomish County | 3,092 |
| Fords Prairie | Lewis County | 3,063 |
| Friday Harbor | San Juan County | 2,806 |
| Fall City | King County | 2,024 |
| Fern Prairie | Clark County | 1,962 |
| Freeland | Island County | 1,856 |
| Fife Heights | King County | 1,432 |
| Fairfield | Spokane County | 588 |
| Four Lakes | Spokane County | 577 |
| Farmington | Whitman County | 137 |