White to Non-White Racial Dissimilarity (5-year estimate) Index for Nantucket County, MA was 21.72% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Nantucket County, MA reached a record high of 40.62 in January of 2011 and a record low of 16.89 in January of 2018. 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 Nantucket County, MA - last updated from the United States Federal Reserve on May of 2024.