White to Non-White Racial Dissimilarity (5-year estimate) Index for Iowa County, WI was 11.72% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Iowa County, WI reached a record high of 29.37 in January of 2015 and a record low of 7.18 in January of 2021. Trading Economics provides the current actual value, an historical data chart and related indicators for White to Non-White Racial Dissimilarity (5-year estimate) Index for Iowa County, WI - last updated from the United States Federal Reserve on May of 2024.