Data / Rankings / Population / Counties in Washington

Counties in Washington by population

King County had the highest population of 39 counties in 2022, at 2.27 million. Garfield County had the lowest, at 2,354. The median was 68,244 and the figure for Washington was 7.79 million. Source: the U.S. Census Bureau.

Highest2,265,822King County
Lowest2,354Garfield County
Median68,24439 counties
Washington7,786,828History

All counties, 2022

CSVChart (SVG)

King CountyKing County: 2,265,822 persons2,265,822Pierce CountyPierce County: 927,456 persons927,456Snohomish CountySnohomish County: 840,860 persons840,860Spokane CountySpokane County: 549,602 persons549,602Clark CountyClark County: 516,807 persons516,807Thurston CountyThurston County: 298,556 persons298,556Kitsap CountyKitsap County: 277,805 persons277,805Yakima CountyYakima County: 256,550 persons256,550Whatcom CountyWhatcom County: 230,641 persons230,641Benton CountyBenton County: 212,818 persons212,818Skagit CountySkagit County: 131,116 persons131,116Cowlitz CountyCowlitz County: 112,021 persons112,021Grant CountyGrant County: 101,277 persons101,277Franklin CountyFranklin County: 98,445 persons98,445Island CountyIsland County: 86,738 persons86,738Lewis CountyLewis County: 85,293 persons85,293Chelan CountyChelan County: 80,011 persons80,011Clallam CountyClallam County: 77,638 persons77,638Grays Harbor CountyGrays Harbor County: 77,108 persons77,108Mason CountyMason County: 68,244 persons68,244Walla Walla CountyWalla Walla County: 62,022 persons62,022Stevens CountyStevens County: 48,282 persons48,282Whitman CountyWhitman County: 47,507 persons47,507Kittitas CountyKittitas County: 47,322 persons47,322Douglas CountyDouglas County: 44,116 persons44,116Okanogan CountyOkanogan County: 43,138 persons43,138Jefferson CountyJefferson County: 33,597 persons33,597Pacific CountyPacific County: 24,091 persons24,091Klickitat CountyKlickitat County: 23,228 persons23,228Asotin CountyAsotin County: 22,489 persons22,489Adams CountyAdams County: 20,849 persons20,849San Juan CountySan Juan County: 18,668 persons18,668Pend Oreille CountyPend Oreille County: 14,145 persons14,145Skamania CountySkamania County: 12,456 persons12,456Lincoln CountyLincoln County: 11,602 persons11,602Ferry CountyFerry County: 7,440 persons7,440Wahkiakum CountyWahkiakum County: 4,693 persons4,693Columbia CountyColumbia County: 4,021 persons4,021Garfield CountyGarfield County: 2,354 persons2,354
persons. Source: U.S. Census Bureau. Retrieved 2026-10-08.

Full ranking

RankCounties2022
persons		Change on 2021
1King County2,265,822+0.5%
2Pierce County927,456-0%
3Snohomish County840,860+0.5%
4Spokane County549,602+0.7%
5Clark County516,807+0.8%
6Thurston County298,556+0.1%
7Kitsap County277,805+0.4%
8Yakima County256,550-0.1%
9Whatcom County230,641+1.7%
10Benton County212,818+1%
11Skagit County131,116+0.1%
12Cowlitz County112,021+0.3%
13Grant County101,277+0.8%
14Franklin County98,445+0.4%
15Island County86,738-1%
16Lewis County85,293+0.8%
17Chelan County80,011+0.2%
18Clallam County77,638-1%
19Grays Harbor County77,108+0.3%
20Mason County68,244+1.4%
21Walla Walla County62,022-0.3%
22Stevens County48,282+1.4%
23Whitman County47,507+9.8%
24Kittitas County47,322+3.7%
25Douglas County44,116+0.6%
26Okanogan County43,138+0.9%
27Jefferson County33,597+0.1%
28Pacific County24,091+0.3%
29Klickitat County23,228+0.2%
30Asotin County22,489+0.1%
31Adams County20,849+1%
32San Juan County18,668+0.2%
33Pend Oreille County14,145+1.8%
34Skamania County12,456+2%
35Lincoln County11,602+2.8%
36Ferry County7,440+2%
37Wahkiakum County4,693+2.3%
38Columbia County4,0210%
39Garfield County2,354+0.3%

Other periods

About this ranking

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.

For Denmark, Statistics Denmark counts the registered resident population on 1 January. Greenland and the Faroe Islands are excluded. The annual series selects the first-quarter reference date from FOLK1A. The World Bank series exists for every country, so use it (through compare) to rank countries on one basis.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

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.

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Questions

Which county has the highest population?

King County, with 2.27 million in 2022, according to the U.S. Census Bureau.

Which county has the lowest population?

Garfield County, with 2,354 in 2022.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program). Retrieved 2026-10-08.

Population: other rankings

Counties in Washington: more rankings