Washington Citizen Population By County in 2010 (ACS-5Yrs)
Updated on March 28, 2026.
Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2010, the citizen population for Washington was 6,092,875 and represented 92.86% of the total Washington population.
Among all Washington counties, King had the highest citizen population (1.68M), followed by Pierce (747.27K), and Snohomish (643.78K).
In terms of percentages, Asotin had the highest percentage of its population being citizens (99.04%), followed by Columbia (98.99%), and Pend Oreille (98.95%).
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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Data Source: US Census - ACS 5-Year (CVAP).
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Washington Citizen Population By County in 2010
Washington Citizen Population By County in 2010
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| County | Citizen Population | % of County Population |
|---|---|---|
| King | 1678580 | 89.33 |
| Pierce | 747265 | 95.48 |
| Snohomish | 643775 | 92.73 |
| Spokane | 448795 | 97.30 |
| Clark | 391685 | 94.42 |
| Kitsap | 240445 | 97.21 |
| Thurston | 236430 | 97.07 |
| Yakima | 204555 | 86.48 |
| Whatcom | 185225 | 94.51 |
| Benton | 155565 | 93.11 |
| Skagit | 107350 | 93.16 |
| Cowlitz | 97690 | 96.49 |
| Island | 76820 | 97.69 |
| Grant | 73400 | 86.21 |
| Lewis | 72105 | 96.59 |
| Grays Harbor | 69260 | 96.07 |
| Clallam | 69045 | 97.74 |
| Chelan | 65650 | 92.47 |
| Mason | 57230 | 96.53 |
| Franklin | 56190 | 78.78 |
| Walla Walla | 53115 | 92.24 |
| Stevens | 42645 | 98.78 |
| Whitman | 40775 | 93.21 |
| Kittitas | 38550 | 96.69 |
| Okanogan | 37530 | 93.27 |
| Douglas | 32510 | 87.49 |
| Jefferson | 29255 | 98.92 |
| Asotin | 21160 | 99.04 |
| Pacific | 20295 | 95.78 |
| Klickitat | 19245 | 95.96 |
| San Juan | 14920 | 95.95 |
| Adams | 14580 | 81.52 |
| Pend Oreille | 12770 | 98.95 |
| Skamania | 10675 | 98.21 |
| Lincoln | 10385 | 98.58 |
| Ferry | 7400 | 98.60 |
| Columbia | 3915 | 98.99 |
| Wahkiakum | 3915 | 98.37 |
| Garfield | 2190 | 97.77 |