Washington Citizen Voting-age Population By County in 2017 (ACS-5Yrs)
Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2017, the citizen voting-age population for Washington was 5,081,380 and represented 70.87% of the total Washington population.
Among all Washington counties, King had the highest citizen voting-age population (1.46M), followed by Pierce (610.63K), and Snohomish (544.16K).
In terms of percentages, Jefferson had the highest percentage of its population being citizens of voting-age (84.85%), followed by San Juan (83.23%), and Wahkiakum (81.61%).
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 | 1459790 | 68.92 |
| Pierce | 610625 | 72.25 |
| Snohomish | 544155 | 70.50 |
| Spokane | 369260 | 75.24 |
| Clark | 323895 | 70.80 |
| Thurston | 202830 | 75.15 |
| Kitsap | 199600 | 77.09 |
| Whatcom | 160225 | 75.32 |
| Yakima | 143230 | 57.69 |
| Benton | 128595 | 67.49 |
| Skagit | 87245 | 71.67 |
| Cowlitz | 77550 | 74.86 |
| Island | 63370 | 78.89 |
| Clallam | 58980 | 80.31 |
| Lewis | 57145 | 75.18 |
| Grays Harbor | 54695 | 76.55 |
| Grant | 52285 | 55.97 |
| Chelan | 52090 | 69.32 |
| Mason | 47525 | 77.19 |
| Franklin | 45395 | 50.93 |
| Walla Walla | 42835 | 71.56 |
| Whitman | 37275 | 77.99 |
| Kittitas | 34565 | 79.05 |
| Stevens | 33720 | 76.88 |
| Okanogan | 28680 | 69.32 |
| Douglas | 25965 | 63.98 |
| Jefferson | 25900 | 84.85 |
| Asotin | 17465 | 78.46 |
| Pacific | 16585 | 79.20 |
| Klickitat | 15930 | 75.25 |
| San Juan | 13500 | 83.23 |
| Pend Oreille | 10295 | 78.80 |
| Skamania | 8980 | 78.09 |
| Adams | 8900 | 46.21 |
| Lincoln | 8035 | 77.67 |
| Ferry | 6105 | 80.65 |
| Wahkiakum | 3350 | 81.61 |
| Columbia | 3125 | 78.13 |
| Garfield | 1685 | 75.73 |
