Income Inequality in McDonough County, IL was 21.56256 Ratio in January of 2022, according to the United States Federal Reserve. Historically, Income Inequality in McDonough County, IL reached a record high of 23.95486 in January of 2016 and a record low of 17.74255 in January of 2010. Trading Economics provides the current actual value, an historical data chart and related indicators for Income Inequality in McDonough County, IL - last updated from the United States Federal Reserve on May of 2024.