White to Non-White Racial Dissimilarity (5-year estimate) Index for Brown County, SD was 35.79% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Brown County, SD reached a record high of 43.01 in January of 2009 and a record low of 18.40 in January of 2013. 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 Brown County, SD - last updated from the United States Federal Reserve on May of 2024.