Ranking of Iowa Counties By Percentage of the Voting-age Population that Identified as Non-Hispanic from Census 2020

According to the data from the United States 2020 decennial Census, in April 2020, among all of Iowa counties, Wayne County had the highest percentange of a county's voting-age population who identified as Non-Hispanic (not hispanic or latino) (99.42%), followed by Adams County (99.27%), and Grundy County (99.13%).

The chart below shows the top 10 counties, and the table below shows the ranking of all Iowa counties based on the percentage of each county's voting-age population that identified as non-hispanic.

You can see similar ranking information for other states and also for the different racial groups in Iowa.