Ranking of Washington Counties By Population in 2024

Updated on June 21, 2025.

Based on the US Census Vintage data estimates, in 2024, the Population for Washington was 7.96M. Among all Washington counties, King County had the highest population (2.34M), followed by Pierce County (941.17K), and Snohomish County (864.11K).

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.

Related Topics: Washington Census Vintage Data Topic List.

Data Source: US Census Bureau (Vintage), 2024 Census.

See this for other years:

Ranking of Washington Counties By Population in 2024

King

Pierce

Snohomish

Spokane

Clark

Thurston

Kitsap

Yakima

Whatcom

Benton

Ranking of Washington Counties By Population in 2024

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Rank	County	Population
1	King County	2340211
2	Pierce County	941170
3	Snohomish County	864113
4	Spokane County	555947
5	Clark County	527269
6	Thurston County	302912
7	Kitsap County	281420
8	Yakima County	258523
9	Whatcom County	234954
10	Benton County	218190
11	Skagit County	132736
12	Cowlitz County	113982
13	Grant County	104717
14	Franklin County	101238
15	Lewis County	87049
16	Island County	86478
17	Chelan County	81228
18	Clallam County	77958
19	Grays Harbor County	77893
20	Mason County	69632
21	Walla Walla County	62068
22	Stevens County	49015
23	Whitman County	48399
24	Kittitas County	48172
25	Douglas County	45795
26	Okanogan County	44942
27	Jefferson County	33944
28	Pacific County	24245
29	Klickitat County	24124
30	Asotin County	22523
31	Adams County	21039
32	San Juan County	18668
33	Pend Oreille County	14332
34	Skamania County	12660
35	Lincoln County	11862
36	Ferry County	7543
37	Wahkiakum County	4800
38	Columbia County	4025
39	Garfield County	2404