White to Non-White Racial Dissimilarity (5-year estimate) Index for Polk County, TN was 35.00% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Polk County, TN reached a record high of 42.85 in January of 2021 and a record low of 15.43 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 Polk County, TN - last updated from the United States Federal Reserve on May of 2024.