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

Based on the US Census ACS-5Yrs estimates, in 2021, there were 24.99K people in Idaho with Welsh ancestry (1.38% of Idaho population). Among all Idaho counties, Oneida County had the highest percentage of its population with Welsh ancestry (17.08%), followed by Butte County (3.69%), and Franklin County (3.37%).

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

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