Income Inequality in Yankton County, SD was 10.50050 Ratio in January of 2022, according to the United States Federal Reserve. Historically, Income Inequality in Yankton County, SD reached a record high of 16.93110 in January of 2017 and a record low of 10.01237 in January of 2021. Trading Economics provides the current actual value, an historical data chart and related indicators for Income Inequality in Yankton County, SD - last updated from the United States Federal Reserve on June of 2024.