Ranking of Washington Counties By Population in 2017

Updated on January 28, 2024.

Based on the US Census Vintage data estimates, in 2017, the Population for Washington was 7.43M. Among all Washington counties, King County had the highest population (2.21M), followed by Pierce County (880.75K), and Snohomish County (803.06K).

The chart below shows the top 10 counties, and the table below shows the ranking of all Washington counties.

You can see similar ranking information for related topics, and for other states. You can also see the ranking of all counties in the United States.

See this for other years:
Ranking of Washington Counties By Population in 2017
King
Pierce
Snohomish
Spokane
Clark
Thurston
Kitsap
Yakima
Whatcom
Benton
Ranking of Washington Counties By Population in 2017
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Rank County Population
1 King County 2205001
2 Pierce County 880745
3 Snohomish County 803061
4 Spokane County 505708
5 Clark County 475238
6 Thurston County 280255
7 Kitsap County 266636
8 Yakima County 249851
9 Whatcom County 221417
10 Benton County 198229
11 Skagit County 125852
12 Cowlitz County 106800
13 Grant County 95262
14 Franklin County 91803
15 Island County 83362
16 Lewis County 78269
17 Chelan County 76216
18 Clallam County 75741
19 Grays Harbor County 72507
20 Mason County 63769
21 Walla Walla County 60683
22 Whitman County 49514
23 Kittitas County 46164
24 Stevens County 44679
25 Douglas County 41961
26 Okanogan County 41802
27 Jefferson County 31264
28 Asotin County 22612
29 Klickitat County 21757
30 Pacific County 21756
31 Adams County 19574
32 San Juan County 16674
33 Pend Oreille County 13360
34 Skamania County 11815
35 Lincoln County 10586
36 Ferry County 7587
37 Wahkiakum County 4207
38 Columbia County 4010
39 Garfield County 2224