Income Inequality in Washington County, IL was 10.44995 Ratio in January of 2022, according to the United States Federal Reserve. Historically, Income Inequality in Washington County, IL reached a record high of 12.21102 in January of 2015 and a record low of 8.63179 in January of 2011. Trading Economics provides the current actual value, an historical data chart and related indicators for Income Inequality in Washington County, IL - last updated from the United States Federal Reserve on May of 2024.