Income Inequality in St. Charles County, MO was 9.42816 Ratio in January of 2022, according to the United States Federal Reserve. Historically, Income Inequality in St. Charles County, MO reached a record high of 9.47627 in January of 2018 and a record low of 8.21824 in January of 2011. Trading Economics provides the current actual value, an historical data chart and related indicators for Income Inequality in St. Charles County, MO - last updated from the United States Federal Reserve on May of 2024.