White to Non-White Racial Dissimilarity (5-year estimate) Index for Polk County, FL was 31.59% 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, FL reached a record high of 36.03 in January of 2010 and a record low of 31.21 in January of 2019. 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, FL - last updated from the United States Federal Reserve on May of 2024.