White to Non-White Racial Dissimilarity (5-year estimate) Index for Union County, TN was 36.46% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Union County, TN reached a record high of 36.75 in January of 2013 and a record low of 14.41 in January of 2017. 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 Union County, TN - last updated from the United States Federal Reserve on May of 2024.