White to Non-White Racial Dissimilarity (5-year estimate) Index for St. Clair County, MI was 40.71% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for St. Clair County, MI reached a record high of 47.35 in January of 2021 and a record low of 38.19 in January of 2016. 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. Clair County, MI - last updated from the United States Federal Reserve on May of 2024.