White to Non-White Racial Dissimilarity (5-year estimate) Index for Johnson County, TN was 31.78% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Johnson County, TN reached a record high of 43.45 in January of 2012 and a record low of 23.73 in January of 2009. 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 Johnson County, TN - last updated from the United States Federal Reserve on May of 2024.