Washington Citizen Population By County in 2012 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2012, the citizen population for Washington was 6,258,325 and represented 92.87% of the total Washington population.

Among all Washington counties, King had the highest citizen population (1.73M), followed by Pierce (761.76K), and Snohomish (662.57K).

In terms of percentages, Garfield had the highest percentage of its population being citizens (99.78%), followed by Asotin (99.19%), and Jefferson (98.93%).

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.

See this for other years:
Washington Citizen Population By County in 2012
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County Citizen Population % of County Population
King 1734345 89.36
Pierce 761760 95.40
Snohomish 662565 92.74
Spokane 457180 97.20
Clark 405060 94.87
Kitsap 244625 97.31
Thurston 243970 96.66
Yakima 210355 86.76
Whatcom 190190 94.43
Benton 165325 94.24
Skagit 109010 93.10
Cowlitz 98870 96.80
Island 76825 97.61
Grant 75900 85.39
Lewis 72420 96.05
Clallam 69870 97.84
Grays Harbor 69025 95.51
Chelan 67300 92.92
Franklin 63555 80.78
Mason 58495 96.61
Walla Walla 54135 92.31
Stevens 42765 98.31
Whitman 41855 93.02
Kittitas 39495 96.44
Okanogan 37510 91.58
Douglas 33575 87.50
Jefferson 29480 98.93
Asotin 21485 99.19
Pacific 20210 96.49
Klickitat 19635 96.16
San Juan 15175 96.41
Adams 14845 79.92
Pend Oreille 12835 98.92
Skamania 10755 97.29
Lincoln 10400 98.72
Ferry 7400 97.56
Columbia 3940 98.50
Wahkiakum 3940 98.38
Garfield 2240 99.78