Income Inequality in St. Clair County, IL was 14.85935 Ratio in January of 2022, according to the United States Federal Reserve. Historically, Income Inequality in St. Clair County, IL reached a record high of 18.11177 in January of 2017 and a record low of 14.08000 in January of 2010. Trading Economics provides the current actual value, an historical data chart and related indicators for Income Inequality in St. Clair County, IL - last updated from the United States Federal Reserve on May of 2024.