Washington Citizen Voting-age Population By County in 2015 (ACS-5Yrs)
Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2015, the citizen voting-age population for Washington was 4,937,210 and represented 70.68% of the total Washington population.
Among all Washington counties, King had the highest citizen voting-age population (1.42M), followed by Pierce (590.35K), and Snohomish (523.92K).
In terms of percentages, Jefferson had the highest percentage of its population being citizens of voting-age (84.34%), followed by Wahkiakum (83.40%), and San Juan (82.61%).
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 | 1414660 | 69.15 |
| Pierce | 590350 | 71.82 |
| Snohomish | 523925 | 70.17 |
| Spokane | 359900 | 74.85 |
| Clark | 311660 | 70.11 |
| Thurston | 196090 | 74.64 |
| Kitsap | 195835 | 76.67 |
| Whatcom | 154750 | 74.72 |
| Yakima | 142030 | 57.41 |
| Benton | 125135 | 67.67 |
| Skagit | 85115 | 71.32 |
| Cowlitz | 76210 | 74.47 |
| Island | 62230 | 78.44 |
| Clallam | 58145 | 80.32 |
| Lewis | 56485 | 74.80 |
| Grays Harbor | 54050 | 75.68 |
| Chelan | 51245 | 69.00 |
| Grant | 50990 | 55.38 |
| Mason | 46835 | 77.04 |
| Franklin | 44035 | 50.94 |
| Walla Walla | 42390 | 70.97 |
| Whitman | 36780 | 78.70 |
| Stevens | 33250 | 76.35 |
| Kittitas | 33225 | 78.72 |
| Okanogan | 28770 | 69.61 |
| Jefferson | 25375 | 84.34 |
| Douglas | 25070 | 63.31 |
| Asotin | 17285 | 78.43 |
| Pacific | 16415 | 79.51 |
| Klickitat | 15845 | 76.11 |
| San Juan | 13180 | 82.61 |
| Pend Oreille | 10195 | 78.60 |
| Adams | 8880 | 46.54 |
| Skamania | 8530 | 75.86 |
| Lincoln | 7995 | 77.14 |
| Ferry | 6150 | 80.39 |
| Wahkiakum | 3365 | 83.40 |
| Columbia | 3115 | 78.07 |
| Garfield | 1720 | 77.13 |
