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

Based on the US Census ACS-5Yrs estimates, in 2021, there were 165.57K people in Idaho with Irish ancestry (9.14% of Idaho population). Among all Idaho counties, Adams County had the highest percentage of its population with Irish ancestry (14.19%), followed by Clearwater County (13.52%), and Shoshone County (13.32%).

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 Idaho.