Income Inequality in Douglas County, SD was 13.12435 Ratio in January of 2022, according to the United States Federal Reserve. Historically, Income Inequality in Douglas County, SD reached a record high of 15.03078 in January of 2020 and a record low of 9.69414 in January of 2010. Trading Economics provides the current actual value, an historical data chart and related indicators for Income Inequality in Douglas County, SD - last updated from the United States Federal Reserve on May of 2024.