# Counties in Washington by population, 2025

All 39 values come from U.S. Census Bureau for 2025, so the places are comparable.

- Indicator id: `population`
- Unit: persons
- Definition: Resident population. Spain and the EU: 1 January, with Spanish figures from the official municipal register (Padrón). United States: Census Bureau population estimates for 1 July. Other countries and the World: World Bank mid-year estimates, which count all residents regardless of legal status or citizenship.
- Source: U.S. Census Bureau, Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program) (https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/)
- Retrieved: 2026-10-08
- Citation: U.S. Census Bureau. Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program). https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-08.
- Web page: https://invokely.ai/rankings/population/washington-counties
- CSV: https://invokely.ai/download/rankings/population/washington-counties.csv

| Rank | Place | persons |
|---:|---|---:|
| 1 | King County | 2,344,939 |
| 2 | Pierce County | 946,288 |
| 3 | Snohomish County | 870,656 |
| 4 | Spokane County | 558,344 |
| 5 | Clark County | 532,119 |
| 6 | Thurston County | 304,261 |
| 7 | Kitsap County | 283,374 |
| 8 | Yakima County | 259,185 |
| 9 | Whatcom County | 236,392 |
| 10 | Benton County | 221,722 |
| 11 | Skagit County | 132,975 |
| 12 | Cowlitz County | 114,885 |
| 13 | Grant County | 105,727 |
| 14 | Franklin County | 102,612 |
| 15 | Lewis County | 88,062 |
| 16 | Island County | 85,657 |
| 17 | Chelan County | 81,941 |
| 18 | Clallam County | 78,202 |
| 19 | Grays Harbor County | 78,144 |
| 20 | Mason County | 71,165 |
| 21 | Walla Walla County | 62,361 |
| 22 | Stevens County | 49,668 |
| 23 | Kittitas County | 48,803 |
| 24 | Whitman County | 48,512 |
| 25 | Douglas County | 46,473 |
| 26 | Okanogan County | 45,230 |
| 27 | Jefferson County | 33,970 |
| 28 | Pacific County | 24,357 |
| 29 | Klickitat County | 24,331 |
| 30 | Asotin County | 22,545 |
| 31 | Adams County | 21,488 |
| 32 | San Juan County | 18,577 |
| 33 | Pend Oreille County | 14,457 |
| 34 | Skamania County | 12,669 |
| 35 | Lincoln County | 11,982 |
| 36 | Ferry County | 7,517 |
| 37 | Wahkiakum County | 4,873 |
| 38 | Columbia County | 4,141 |
| 39 | Garfield County | 2,416 |