White to Non-White Racial Dissimilarity (5-year estimate) Index for Polk County, NC was 24.26% 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, NC reached a record high of 25.74 in January of 2017 and a record low of 9.77 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, NC - last updated from the United States Federal Reserve on May of 2024.