Ranking of Washington Counties By Percentage of Population with Irish Ancestry in 2021

Based on the US Census ACS-5Yrs estimates, in 2021, there were 767.54K people in Washington with Irish ancestry (10.08% of Washington population). Among all Washington counties, Ferry County had the highest percentage of its population with Irish ancestry (15.03%), followed by Garfield County (14.44%), and Jefferson County (14.39%).

The chart and table below shows the top 10 counties with high percentage of its population having Irish ancestry.

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