Income Inequality in Lake County, SD was 17.04887 Ratio in January of 2022, according to the United States Federal Reserve. Historically, Income Inequality in Lake County, SD reached a record high of 17.13349 in January of 2017 and a record low of 10.24280 in January of 2010. Trading Economics provides the current actual value, an historical data chart and related indicators for Income Inequality in Lake County, SD - last updated from the United States Federal Reserve on May of 2024.