Income Inequality in Polk County, TN was 15.06831 Ratio in January of 2022, according to the United States Federal Reserve. Historically, Income Inequality in Polk County, TN reached a record high of 15.06831 in January of 2022 and a record low of 11.26378 in January of 2019. Trading Economics provides the current actual value, an historical data chart and related indicators for Income Inequality in Polk County, TN - last updated from the United States Federal Reserve on May of 2024.