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

Based on the US Census ACS-5Yrs estimates, in 2021, there were 321.04K people in Idaho with English ancestry (17.72% of Idaho population). Among all Idaho counties, Oneida County had the highest percentage of its population with English ancestry (32.28%), followed by Madison County (32.27%), and Custer County (31.20%).

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

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