Income Inequality in Clark County, SD was 15.17504 Ratio in January of 2022, according to the United States Federal Reserve. Historically, Income Inequality in Clark County, SD reached a record high of 15.71361 in January of 2019 and a record low of 10.19201 in January of 2017. Trading Economics provides the current actual value, an historical data chart and related indicators for Income Inequality in Clark County, SD - last updated from the United States Federal Reserve on May of 2024.