Income Inequality in St. Clair County, MO was 13.19141 Ratio in January of 2022, according to the United States Federal Reserve. Historically, Income Inequality in St. Clair County, MO reached a record high of 13.19141 in January of 2022 and a record low of 9.88741 in January of 2012. Trading Economics provides the current actual value, an historical data chart and related indicators for Income Inequality in St. Clair County, MO - last updated from the United States Federal Reserve on May of 2024.