Washington Citizen Voting-age Population By County in 2020 (ACS-5Yrs)
Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2020, the citizen voting-age population for Washington was 5,344,645 and represented 71.14% of the total Washington population.
Among all Washington counties, King had the highest citizen voting-age population (1.53M), followed by Pierce (647.82K), and Snohomish (569.89K).
In terms of percentages, Jefferson had the highest percentage of its population being citizens of voting-age (86.05%), followed by Ferry (83.13%), and San Juan (82.98%).
The chart and table below shows the citizen voting-age population of each county and the percentage of each county's population that were citizens of voting-age.
You can see similar information for other states and by state for the United States.
| County | Citizen Voting-age Population | % of County Population |
|---|---|---|
| King | 1524945 | 68.54 |
| Pierce | 647820 | 72.64 |
| Snohomish | 569890 | 70.22 |
| Spokane | 389100 | 75.79 |
| Clark | 347085 | 72.02 |
| Thurston | 215120 | 75.56 |
| Kitsap | 207375 | 77.11 |
| Whatcom | 170360 | 75.87 |
| Yakima | 147260 | 58.75 |
| Benton | 135220 | 67.37 |
| Skagit | 93170 | 73.11 |
| Cowlitz | 81755 | 75.42 |
| Island | 66905 | 79.47 |
| Clallam | 62080 | 81.17 |
| Lewis | 60015 | 75.56 |
| Grays Harbor | 56970 | 77.23 |
| Grant | 56825 | 58.80 |
| Chelan | 52830 | 68.92 |
| Mason | 50255 | 76.93 |
| Franklin | 50230 | 53.62 |
| Walla Walla | 44995 | 74.02 |
| Whitman | 38685 | 78.03 |
| Kittitas | 38015 | 80.72 |
| Stevens | 35165 | 77.74 |
| Okanogan | 29410 | 69.89 |
| Jefferson | 27385 | 86.05 |
| Douglas | 27045 | 63.61 |
| Pacific | 17915 | 80.99 |
| Asotin | 17585 | 77.69 |
| Klickitat | 16555 | 75.06 |
| San Juan | 14070 | 82.98 |
| Pend Oreille | 10855 | 79.88 |
| Skamania | 9475 | 79.59 |
| Adams | 9200 | 46.70 |
| Lincoln | 8370 | 78.01 |
| Ferry | 6355 | 83.13 |
| Wahkiakum | 3460 | 80.09 |
| Columbia | 3185 | 79.13 |
| Garfield | 1725 | 76.33 |
