
Washington is divided into 39 counties. Use the interactive maps below to explore Washington's counties and their boundaries. Download free maps or learn more about creating a custom map of Washington to visualize your own data.
| # | County | County seat | Year founded |
|---|---|---|---|
| 1 | Adams | Ritzville | 1883 |
| 2 | Asotin | Asotin | 1883 |
| 3 | Benton | Prosser | 1905 |
| 4 | Chelan | Wenatchee | 1899 |
| 5 | Clallam | Port Angeles | 1854 |
| 6 | Clark | Vancouver | 1845 |
| 7 | Columbia | Dayton | 1875 |
| 8 | Cowlitz | Kelso | 1854 |
| 9 | Douglas | Waterville | 1883 |
| 10 | Ferry | Republic | 1899 |
| 11 | Franklin | Pasco | 1883 |
| 12 | Garfield | Pomeroy | 1881 |
| 13 | Grant | Ephrata | 1909 |
| 14 | Grays Harbor | Montesano | 1854 |
| 15 | Island | Coupeville | 1852 |
| 16 | Jefferson | Port Townsend | 1852 |
| 17 | King | Seattle | 1852 |
| 18 | Kitsap | Port Orchard | 1857 |
| 19 | Kittitas | Ellensburg | 1883 |
| 20 | Klickitat | Goldendale | 1859 |
| 21 | Lewis | Chehalis | 1845 |
| 22 | Lincoln | Davenport | 1883 |
| 23 | Mason | Shelton | 1854 |
| 24 | Okanogan | Okanogan | 1888 |
| 25 | Pacific | South Bend | 1851 |
| 26 | Pend Oreille | Newport | 1911 |
| 27 | Pierce | Tacoma | 1852 |
| 28 | San Juan | Friday Harbor | 1873 |
| 29 | Skagit | Mount Vernon | 1883 |
| 30 | Skamania | Stevenson | 1854 |
| 31 | Snohomish | Everett | 1861 |
| 32 | Spokane | Spokane | 1879 |
| 33 | Stevens | Colville | 1863 |
| 34 | Thurston | Olympia | 1852 |
| 35 | Wahkiakum | Cathlamet | 1854 |
| 36 | Walla Walla | Walla Walla | 1854 |
| 37 | Whatcom | Bellingham | 1854 |
| 38 | Whitman | Colfax | 1871 |
| 39 | Yakima | Yakima | 1865 |
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This map is divided into 39 counties.
Sep 15, 2025:
Aug 26, 2024:
Washington has 39 counties.
The largest county by land area in Washington is Okanogan County, covering 5,268 square miles (13,647 km²).
The smallest county by land area is San Juan County, with 174 square miles (451 km²) of land, entirely composed of islands.
King County is Washington’s most populous county, with 2,269,675 residents. It includes Seattle, the largest city in the state.
Garfield County has the lowest population, with 2,404 residents.
You can use Ultimaps to create custom maps of Washington. Color-code counties manually or upload data, place pins, customize look and feel, and export to PNG, PDF, or SVG.