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

Based on the US Census ACS-5Yrs estimates, in 2021, there were 16.83K people in Idaho with Scotch Irish ancestry (0.93% of Idaho population). Among all Idaho counties, Boise County had the highest percentage of its population with Scotch Irish ancestry (2.28%), followed by Shoshone County (1.87%), and Clearwater County (1.74%).

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

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