Washington 2020 Census Population Density By County Map

The population density of Washington from the 2020 Census was 115.95 people per square mile, based on data from the US Census Bureau.

King County had the highest population density (1,073.02 people per square mile), followed by Clark County (800.82 people per square mile), and then Kitsap County (697.57 people per square mile). On the other hand, the 3 counties with the lowest population density were: Garfield County (3.22 people per square mile), Ferry County (3.26 people per square mile), and Columbia County (4.55 people per square mile).

You can also see this information for other states and also for the US by state.

Hover over or click on the counties to see the population density for each county. The data can also be found in a table below. You can use the table to sort, filter, and explore the data further.