Income Inequality in Polk County, IA was 11.79075 Ratio in January of 2022, according to the United States Federal Reserve. Historically, Income Inequality in Polk County, IA reached a record high of 13.34360 in January of 2015 and a record low of 11.46892 in January of 2020. Trading Economics provides the current actual value, an historical data chart and related indicators for Income Inequality in Polk County, IA - last updated from the United States Federal Reserve on May of 2024.