County Maps US

Washington County Map

Washington has 39 counties. Together they cover 66,457 sq mi of land and 8,001,020 people.

Neighbouring areas are given different colours so their shared borders read clearly. These colours carry no data.

Boundaries from the 2025 Census cartographic boundary file, generalised so that no point moves by more than half a pixel at this width. Select any area to open its page.
Counties
39
33rd most of the 51 states and DC
Population
8,001,020
13th largest
Land area
66,457
square miles
Density
120.4
people per square mile, computed

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025. Retrieved 30 August 2026.

Download this map

Free to use and redistribute. The boundaries are public-domain Census Bureau data; attribution to County Maps US is appreciated but not required.

Satellite view

Aerial imagery of Washington with the state boundary drawn on top. County lines are not drawn here: at this scale they would bury the picture, and the map above already carries them.

Aerial view of Washington from the USGS National Map, with its boundary outlined
Imagery: USGS National Map, USGS Imagery Only, public domain, requested from USGS by your browser when you reach this point on the page, at 800 by 550 pixels. The boundary is the 2025 Census cartographic boundary file, reprojected to Web Mercator to match the imagery. You can also open the USGS National Map viewer.

The extremes of Washington

Most populous

King County

2,344,939

Least populous

Garfield County

2,416

Largest by land area

Okanogan County

5,266 sq mi

Smallest by land area

San Juan County

173.9 sq mi

Most densely populated

King County

1,108 per sq mi

Highest median household income

King County

$124,746

Which is the largest county in Washington? The answer depends on whether you mean area or population.

The counties, by shape

Every one, drawn to its own scale so the small ones stay recognisable. Shape alone is not a size comparison; the table below carries the areas.

What the map does not say

The counties of Washington are nowhere near the same size. Okanogan County covers 5,266 sq mi of land, 30.3 times the 173.9 sq mi of San Juan County. People are spread even less evenly: King County packs 1,108 per sq mi while Garfield County holds 3.4 per sq mi.

They were not drawn in one sitting either. Lewis County dates to 1845, and the boundaries were still being redrawn when Pend Oreille County was organised in 1911, 66 years later. Founding years come from Wikidata and are worth checking against the county's own history before citing.

Water is part of the picture too: 72.0% of San Juan County is water, the most in the state, which is why its land area and total area disagree. And 17 of the 39 counties here share their names with counties in other states, so searching by name alone can land in the wrong place; the A to Z index lists every duplicate.

All 39 counties of Washington

Sortable on any column. This table doubles as the text alternative to the map above: every area is a link, in alphabetical order, whether or not the map renders.

The 39 counties of Washington, with population, land area, density, median household income, county seat and FIPS code.
NamePopulationLand areaDensityMedian incomeSeatFIPS
Adams County21,4881,925 sq mi11.2 per sq mi$66,136Ritzville53001
Asotin County22,545636.1 sq mi35.4 per sq mi$72,283Asotin53003
Benton County221,7221,700 sq mi130 per sq mi$89,874Prosser53005
Chelan County81,9412,921 sq mi28.1 per sq mi$82,381Wenatchee53007
Clallam County78,2021,739 sq mi45.0 per sq mi$70,370Port Angeles53009
Clark County532,119628.5 sq mi847 per sq mi$97,536Vancouver53011
Columbia County4,141868.6 sq mi4.8 per sq mi$71,810Dayton53013
Cowlitz County114,8851,141 sq mi101 per sq mi$76,531Kelso53015
Douglas County46,4731,819 sq mi25.5 per sq mi$80,363Waterville53017
Ferry County7,5172,203 sq mi3.4 per sq mi$55,614Republic53019
Franklin County102,6121,242 sq mi82.6 per sq mi$86,714Pasco53021
Garfield County2,416710.8 sq mi3.4 per sq mi$64,884Pomeroy53023
Grant County105,7272,680 sq mi39.5 per sq mi$73,267Ephrata53025
Grays Harbor County78,1441,902 sq mi41.1 per sq mi$64,414Montesano53027
Island County85,657208.7 sq mi410 per sq mi$90,551Coupeville53029
Jefferson County33,9701,804 sq mi18.8 per sq mi$74,048Port Townsend53031
King County2,344,9392,116 sq mi1,108 per sq mi$124,746Seattle53033
Kitsap County283,374395.1 sq mi717 per sq mi$104,158Port Orchard53035
Kittitas County48,8032,297 sq mi21.2 per sq mi$73,804Ellensburg53037
Klickitat County24,3311,872 sq mi13.0 per sq mi$71,042Goldendale53039
Lewis County88,0622,403 sq mi36.7 per sq mi$74,796Chehalis53041
Lincoln County11,9822,311 sq mi5.2 per sq mi$71,512Davenport53043
Mason County71,165959.6 sq mi74.2 per sq mi$83,270Shelton53045
Okanogan County45,2305,266 sq mi8.6 per sq mi$63,207Okanogan53047
Pacific County24,357933.4 sq mi26.1 per sq mi$67,081South Bend53049
Pend Oreille County14,4571,400 sq mi10.3 per sq mi$67,436Newport53051
Pierce County946,2881,668 sq mi567 per sq mi$99,564Tacoma53053
San Juan County18,577173.9 sq mi107 per sq mi$84,800Friday Harbor53055
Skagit County132,9751,730 sq mi76.9 per sq mi$89,263Mount Vernon53057
Skamania County12,6691,658 sq mi7.6 per sq mi$93,265Stevenson53059
Snohomish County870,6562,087 sq mi417 per sq mi$111,246Everett53061
Spokane County558,3441,764 sq mi316 per sq mi$78,582Spokane53063
Stevens County49,6682,477 sq mi20.1 per sq mi$69,327Colville53065
Thurston County304,261722.5 sq mi421 per sq mi$96,563Olympia53067
Wahkiakum County4,873262.9 sq mi18.5 per sq mi$62,653Cathlamet53069
Walla Walla County62,3611,270 sq mi49.1 per sq mi$74,202Walla Walla53071
Whatcom County236,3922,108 sq mi112 per sq mi$81,784Bellingham53073
Whitman County48,5122,159 sq mi22.5 per sq mi$55,406Colfax53075
Yakima County259,1854,295 sq mi60.4 per sq mi$70,656Yakima53077

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; US Census Bureau, American Community Survey, American Community Survey 2020-2024 5-Year Estimates, released 29 January 2026; Wikidata (CC0), Wikidata. Retrieved 30 August 2026.

Looking for Washington County?

Washington is also the name of 31 counties in other states. If you meant one of those rather than the state of Washington, they are listed here.

The ten most populous

  1. King County2,344,939
  2. Pierce County946,288
  3. Snohomish County870,656
  4. Spokane County558,344
  5. Clark County532,119
  6. Thurston County304,261
  7. Kitsap County283,374
  8. Yakima County259,185
  9. Whatcom County236,392
  10. Benton County221,722

Data on this page last rebuilt 30 August 2026. How these figures are produced.