Income Inequality in Lyman County, SD was 15.19904 Ratio in January of 2022, according to the United States Federal Reserve. Historically, Income Inequality in Lyman County, SD reached a record high of 15.19904 in January of 2022 and a record low of 7.98864 in January of 2010. Trading Economics provides the current actual value, an historical data chart and related indicators for Income Inequality in Lyman County, SD - last updated from the United States Federal Reserve on May of 2024.