Washington 2020 Census Total Population By County

Updated on January 23, 2023.

The total population of Washington from the 2020 Census was 7,705,281, based on data from the US Census Bureau.

King County was the most populated county (2,269,675), followed by Pierce County (921,130), and then Snohomish County (827,957). On the other hand, the 3 counties that were least populated include: Garfield County (2,286), Columbia County (3,952), and Wahkiakum County (4,422).

You can also see this information for other states and also for the national level by state.

Hover over or click on the counties to see the number and percentage of Washington population that lives in each county. The data can also be found in a table below. You can use the table to sort, filter, and explore the data further.

Washington 2020 Census Total Population By County
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County Population % of Washington Pop.
Adams 20613 0.27
Asotin 22285 0.29
Benton 206873 2.69
Chelan 79074 1.03
Clallam 77155 1.00
Clark 503311 6.53
Columbia 3952 0.05
Cowlitz 110730 1.44
Douglas 42938 0.56
Ferry 7178 0.09
Franklin 96749 1.26
Garfield 2286 0.03
Grant 99123 1.29
Grays Harbor 75636 0.98
Island 86857 1.13
Jefferson 32977 0.43
King 2269675 29.46
Kitsap 275611 3.58
Kittitas 44337 0.57
Klickitat 22735 0.30
Lewis 82149 1.07
Lincoln 10876 0.14
Mason 65726 0.85
Okanogan 42104 0.55
Pacific 23365 0.30
Pend Oreille 13401 0.17
Pierce 921130 11.96
San Juan 17788 0.23
Skagit 129523 1.68
Skamania 12036 0.16
Snohomish 827957 10.75
Spokane 539339 7.00
Stevens 46445 0.60
Thurston 294793 3.83
Wahkiakum 4422 0.06
Walla Walla 62584 0.81
Whatcom 226847 2.94
Whitman 47973 0.62
Yakima 256728 3.33