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

Based on the US Census ACS-5Yrs estimates, in 2021, there were 418.15K people in Idaho with Unclassified ancestry (23.08% of Idaho population). Among all Idaho counties, Franklin County had the highest percentage of its population with Unclassified ancestry (31.16%), followed by Butte County (29.65%), and Caribou County (29.60%).

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

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