White to Non-White Racial Dissimilarity (5-year estimate) Index for Polk County, NE was 23.04% 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, NE reached a record high of 42.28 in January of 2009 and a record low of 23.04 in January of 2022. 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, NE - last updated from the United States Federal Reserve on May of 2024.