24 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Federal Way | King County | 100,066 |
| Frederickson | Pierce County | 25,065 |
| Five Corners | Clark County | 21,949 |
| Fairwood | King County | 18,335 |
| Ferndale | Whatcom County | 17,096 |
| Fort Lewis | Pierce County | 14,435 |
| Felida | Clark County | 11,204 |
| Fife | King County | 11,080 |
| Fairwood | Spokane County | 10,829 |
| Fircrest | Pierce County | 6,944 |
| Finley | Benton County | 5,691 |
| Forks | Clallam County | 3,448 |
| Fox Island | Pierce County | 3,324 |
| Fairchild AFB | Spokane County | 3,053 |
| Friday Harbor | San Juan County | 2,772 |
| Fobes Hill | Snohomish County | 2,724 |
| Fern Prairie | Clark County | 2,170 |
| Freeland | Island County | 1,954 |
| Fords Prairie | Lewis County | 1,732 |
| Fall City | King County | 1,705 |
| Fife Heights | King County | 1,411 |
| Fairfield | Spokane County | 599 |
| Four Lakes | Spokane County | 485 |
| Farmington | Whitman County | 134 |