Income Inequality in Marshall County, IL was 12.51293 Ratio in January of 2022, according to the United States Federal Reserve. Historically, Income Inequality in Marshall County, IL reached a record high of 12.51293 in January of 2022 and a record low of 8.78864 in January of 2014. Trading Economics provides the current actual value, an historical data chart and related indicators for Income Inequality in Marshall County, IL - last updated from the United States Federal Reserve on May of 2024.