Washington / Counties by Population

Washington Counties by Population

Below are the 39 Washington counties sorted by population from 1 to 39 . The population data are from the 2020 Census Redistricting dataset. If 2020 Census data are not available for a geography, then the population data are from the Census’ 2019 American Community Survey.

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Rank County Population
1 King County 2,195,502
2 Pierce County 877,013
3 Snohomish County 798,808
4 Spokane County 505,505
5 Clark County 473,252
6 Thurston County 279,711
7 Kitsap County 265,882
8 Yakima County 249,697
9 Whatcom County 220,821
10 Benton County 197,518
11 Skagit County 125,612
12 Cowlitz County 106,778
13 Grant County 95,502
14 Franklin County 92,009
15 Island County 82,866
16 Lewis County 78,145
17 Chelan County 76,229
18 Clallam County 75,392
19 Grays Harbor County 72,779
20 Mason County 63,804
21 Walla Walla County 60,365
22 Whitman County 49,231
23 Kittitas County 45,897
24 Stevens County 44,655
25 Douglas County 42,023
26 Okanogan County 41,842
27 Jefferson County 31,285
28 Asotin County 22,421
29 Klickitat County 21,721
30 Pacific County 21,688
31 Adams County 19,594
32 San Juan County 16,788
33 Pend Oreille County 13,377
34 Skamania County 11,753
35 Lincoln County 10,574
36 Ferry County 7,578
37 Wahkiakum County 4,268
38 Columbia County 3,992
39 Garfield County 2,230

United States Census Bureau. B01001 SEX BY AGE, 2019 American Community Survey 5-Year Estimates. U.S. Census Bureau, American Community Survey Office. Web. 10 December 2020. http://www.census.gov/.

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