Income Inequality in Clark County, IL was 9.67313 Ratio in January of 2022, according to the United States Federal Reserve. Historically, Income Inequality in Clark County, IL reached a record high of 11.62780 in January of 2010 and a record low of 8.93393 in January of 2020. Trading Economics provides the current actual value, an historical data chart and related indicators for Income Inequality in Clark County, IL - last updated from the United States Federal Reserve on May of 2024.