Washington Citizen Population By County in 2016 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2016, the citizen population for Washington was 6,564,105 and represented 92.80% of the total Washington population.

Among all Washington counties, King had the highest citizen population (1.85M), followed by Pierce (796.85K), and Snohomish (704.87K).

In terms of percentages, Asotin had the highest percentage of its population being citizens (99.41%), followed by Garfield (99.10%), and Lincoln (99.08%).

The chart and table below shows the citizen population of each county and the percentage of each county's population that were citizens.

You can see similar information for other states and by state for the United States.

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Washington Citizen Population By County in 2016
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County Citizen Population % of County Population
King 1846610 88.80
Pierce 796845 95.67
Snohomish 704870 92.91
Spokane 472680 97.29
Clark 428985 95.14
Thurston 257830 96.82
Kitsap 251905 97.83
Yakima 214010 86.41
Whatcom 198875 94.82
Benton 175930 93.82
Skagit 112545 93.42
Cowlitz 100260 97.48
Island 78130 97.52
Grant 78060 84.36
Lewis 73455 97.00
Franklin 72880 83.00
Clallam 71210 97.59
Chelan 69410 92.84
Grays Harbor 68935 96.77
Mason 58545 95.88
Walla Walla 55335 92.52
Whitman 44120 92.89
Stevens 43270 98.91
Kittitas 41370 96.69
Okanogan 38145 92.36
Douglas 35615 88.82
Jefferson 29725 97.99
Asotin 21985 99.41
Pacific 20015 96.48
Klickitat 19925 95.20
San Juan 15530 96.73
Adams 15455 80.92
Pend Oreille 12830 98.69
Skamania 10980 97.04
Lincoln 10230 99.08
Ferry 7550 98.82
Wahkiakum 3980 98.27
Columbia 3860 97.23
Garfield 2210 99.10