Income Inequality in Lincoln County, SD was 9.93067 Ratio in January of 2022, according to the United States Federal Reserve. Historically, Income Inequality in Lincoln County, SD reached a record high of 11.02995 in January of 2018 and a record low of 9.48531 in January of 2014. Trading Economics provides the current actual value, an historical data chart and related indicators for Income Inequality in Lincoln County, SD - last updated from the United States Federal Reserve on May of 2024.