Ranking of Washington Counties By Population with Unclassified Ancestry in 2021

Based on the US Census ACS-5Yrs estimates, in 2021, there were 1.49M people in Washington with Unclassified ancestry. Among all Washington counties, King County had the highest population with Unclassified ancestry (345.62K), followed by Pierce County (202.29K), and Snohomish County (164.03K).

The chart and table below shows the top 10 counties with high number of people with Unclassified ancestry.

You can see similar information for other states and for other ancestry groups in Washington.