White to Non-White Racial Dissimilarity (5-year estimate) Index for Spink County, SD was 55.71% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Spink County, SD reached a record high of 55.71 in January of 2022 and a record low of 21.70 in January of 2011. 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 Spink County, SD - last updated from the United States Federal Reserve on May of 2024.