White to Non-White Racial Dissimilarity (5-year estimate) Index for St. Croix County, WI was 20.88% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for St. Croix County, WI reached a record high of 28.94 in January of 2010 and a record low of 17.36 in January of 2019. 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 St. Croix County, WI - last updated from the United States Federal Reserve on May of 2024.