Income Inequality in Montgomery County, IL was 14.87334 Ratio in January of 2022, according to the United States Federal Reserve. Historically, Income Inequality in Montgomery County, IL reached a record high of 14.87334 in January of 2022 and a record low of 10.34587 in January of 2013. Trading Economics provides the current actual value, an historical data chart and related indicators for Income Inequality in Montgomery County, IL - last updated from the United States Federal Reserve on May of 2024.