White to Non-White Racial Dissimilarity (5-year estimate) Index for Lyman County, SD was 50.98% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Lyman County, SD reached a record high of 94.34 in January of 2009 and a record low of 4.87 in January of 2012. 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 Lyman County, SD - last updated from the United States Federal Reserve on May of 2024.