Washington Counties by Population

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

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Rank County Population
1 King County 2,254,371
2 Pierce County 918,993
3 Snohomish County 828,337
4 Spokane County 538,711
5 Clark County 504,091
6 Thurston County 294,272
7 Kitsap County 275,411
8 Yakima County 256,143
9 Whatcom County 226,523
10 Benton County 207,560
11 Skagit County 129,480
12 Cowlitz County 110,621
13 Grant County 99,145
14 Franklin County 96,692
15 Island County 86,510
16 Lewis County 82,663
17 Chelan County 79,076
18 Clallam County 77,333
19 Grays Harbor County 75,672
20 Mason County 66,053
21 Walla Walla County 62,150
22 Whitman County 47,141
23 Stevens County 46,774
24 Kittitas County 44,424
25 Douglas County 43,189
26 Okanogan County 42,336
27 Jefferson County 33,006
28 Pacific County 23,396
29 Klickitat County 22,798
30 Asotin County 22,370
31 Adams County 20,557
32 San Juan County 18,001
33 Pend Oreille County 13,570
34 Skamania County 12,118
35 Lincoln County 11,036
36 Ferry County 7,260
37 Wahkiakum County 4,476
38 Columbia County 3,980
39 Garfield County 2,310

United States Census Bureau. B01001 SEX BY AGE, 2022 American Community Survey 5-Year Estimates. U.S. Census Bureau, American Community Survey Office. Web. 7 December 2023. http://www.census.gov/.

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