White to Non-White Racial Dissimilarity (5-year estimate) Index for Grant County, SD was 25.19% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Grant County, SD reached a record high of 64.76 in January of 2017 and a record low of 12.88 in January of 2020. 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 Grant County, SD - last updated from the United States Federal Reserve on May of 2024.