Income Inequality in Jefferson County, MO was 9.48080 Ratio in January of 2022, according to the United States Federal Reserve. Historically, Income Inequality in Jefferson County, MO reached a record high of 9.99593 in January of 2013 and a record low of 9.02034 in January of 2021. Trading Economics provides the current actual value, an historical data chart and related indicators for Income Inequality in Jefferson County, MO - last updated from the United States Federal Reserve on May of 2024.