Washington Counties by Population

Below are the 39 Washington counties sorted by population from largest to smallest. The population data are from the 2022 Population Estimates Program and 2021 American Community Survey.

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Rank County Population
1 King County 2,266,789
2 Pierce County 927,380
3 Snohomish County 840,079
4 Spokane County 549,690
5 Clark County 516,779
6 Thurston County 298,758
7 Kitsap County 277,673
8 Yakima County 257,001
9 Whatcom County 230,677
10 Benton County 212,791
11 Skagit County 131,179
12 Cowlitz County 111,956
13 Grant County 101,311
14 Franklin County 98,678
15 Island County 86,625
16 Lewis County 85,370
17 Chelan County 79,926
18 Clallam County 77,805
19 Grays Harbor County 77,038
20 Mason County 68,166
21 Walla Walla County 61,890
22 Stevens County 48,229
23 Whitman County 47,619
24 Kittitas County 45,189
25 Douglas County 44,192
26 Okanogan County 43,127
27 Jefferson County 33,589
28 Pacific County 24,113
29 Klickitat County 23,271
30 Asotin County 22,508
31 Adams County 20,961
32 San Juan County 18,662
33 Pend Oreille County 14,179
34 Skamania County 12,460
35 Lincoln County 11,601
36 Ferry County 7,448
37 Wahkiakum County 4,688
38 Columbia County 4,026
39 Garfield County 2,363

United States Census Bureau. B01001 SEX BY AGE, 2021 American Community Survey 5-Year Estimates. U.S. Census Bureau, American Community Survey Office. Web. 8 December 2022. http://www.census.gov/.

United States Census Bureau. Annual Estimates of the Resident Population: April 1, 2020 to July 1, 2022. U.S. Census Bureau, Population Division. Web. May 2023. http://www.census.gov/.

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