White to Non-White Racial Dissimilarity (5-year estimate) Index for Mason County, MI was 21.10% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Mason County, MI reached a record high of 29.19 in January of 2019 and a record low of 16.68 in January of 2015. 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 Mason County, MI - last updated from the United States Federal Reserve on May of 2024.