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

Based on the US Census ACS-5Yrs estimates, in 2021, there were 16.53K people in Idaho with British ancestry (0.91% of Idaho population). Among all Idaho counties, Teton County had the highest percentage of its population with British ancestry (2.24%), followed by Custer County (2.18%), and Madison County (1.70%).

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

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