Washington Citizen Population By County in 2018 (ACS-5Yrs)

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2018, the citizen population for Washington was 6,757,545 and represented 92.64% of the total Washington population.

Among all Washington counties, King had the highest citizen population (1.91M), followed by Pierce (822.87K), and Snohomish (727.36K).

In terms of percentages, Lincoln had the highest percentage of its population being citizens (99.14%), followed by Ferry (99.01%), and Stevens (98.77%).

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.